HU9802067A2 - A method of forming an acoustic device, passive and active acoustic device - Google Patents

A method of forming an acoustic device, passive and active acoustic device Download PDF

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Publication number
HU9802067A2
HU9802067A2 HU9802067A HU9802067A HU9802067A2 HU 9802067 A2 HU9802067 A2 HU 9802067A2 HU 9802067 A HU9802067 A HU 9802067A HU 9802067 A HU9802067 A HU 9802067A HU 9802067 A2 HU9802067 A2 HU 9802067A2
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Hungary
Prior art keywords
acoustic device
resonant panel
device according
resonant
characterized
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Application number
HU9802067A
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Hungarian (hu)
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HU9802067A3 (en
Inventor
Henry Azima
Martin Colloms
Neil Harris
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New Transducers Limited
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Family has litigation
Priority to GBGB9517918.0A priority Critical patent/GB9517918D0/en
Priority to GBGB9522281.6A priority patent/GB9522281D0/en
Priority to GBGB9606836.6A priority patent/GB9606836D0/en
Application filed by New Transducers Limited filed Critical New Transducers Limited
Priority to PCT/GB1996/002145 priority patent/WO1997009842A2/en
Publication of HU9802067A2 publication Critical patent/HU9802067A2/en
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=34865237&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=HU9802067(A2) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Publication of HU9802067A3 publication Critical patent/HU9802067A3/en

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Classifications

    • GPHYSICS
    • G10MUSICAL INSTRUMENTS; ACOUSTICS
    • G10HELECTROPHONIC MUSICAL INSTRUMENTS
    • G10H1/00Details of electrophonic musical instruments
    • G10H1/32Constructional details
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/02Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/025Arrangements for fixing loudspeaker transducers, e.g. in a box, furniture
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/02Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/028Casings; Cabinets ; Supports therefor; Mountings therein associated with devices performing functions other than acoustics, e.g. electric candles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00Details of transducers, loudspeakers or microphones
    • H04R1/20Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only
    • H04R1/24Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00Piezo-electric transducers; Electrostrictive transducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/003Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R5/00Stereophonic arrangements
    • H04R5/02Spatial or constructional arrangements of loudspeakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/045Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04Plane diaphragms
    • H04R7/06Plane diaphragms comprising a plurality of sections or layers
    • H04R7/10Plane diaphragms comprising a plurality of sections or layers comprising superposed layers in contact
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones
    • H04R7/18Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/16Mounting or tensioning of diaphragms or cones
    • H04R7/18Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/22Clamping rim of diaphragm or cone against seating
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02Details
    • H04R9/025Magnetic circuit
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06Loudspeakers
    • H04R9/066Loudspeakers using the principle of inertia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60RVEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R11/00Arrangements for holding or mounting articles, not otherwise provided for
    • B60R11/02Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof
    • B60R11/0217Arrangements for holding or mounting articles, not otherwise provided for for radio sets, television sets, telephones, or the like; Arrangement of controls thereof for loud-speakers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N5/00Details of television systems
    • H04N5/64Constructional details of receivers, e.g. cabinets or dust covers
    • H04N5/642Disposition of sound reproducers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2201/00Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
    • H04R2201/02Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
    • H04R2201/021Transducers or their casings adapted for mounting in or to a wall or ceiling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2205/00Details of stereophonic arrangements covered by H04R5/00 but not provided for in any of its subgroups
    • H04R2205/024Positioning of loudspeaker enclosures for spatial sound reproduction
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2400/00Loudspeakers
    • H04R2400/07Suspension between moving magnetic core and housing
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/03Resonant bending wave transducer used as a microphone
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/05Aspects relating to the positioning and way or means of mounting of exciters to resonant bending wave panels
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/07Loudspeakers using bending wave resonance and pistonic motion to generate sound
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/11Transducers incorporated or for use in hand-held devices, e.g. mobile phones, PDA's, camera's
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/13Acoustic transducers and sound field adaptation in vehicles
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10General applications
    • H04R2499/15Transducers incorporated in visual displaying devices, e.g. televisions, computer displays, laptops
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • H04R3/12Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14Cross-over networks
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00Diaphragms for electromechanical transducers; Cones
    • H04R7/02Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12Non-planar diaphragms or cones

Description

COPIES

PROCEDURE FOR THE DEVELOPMENT OF ACUSICAL TOOLS, ACTIVE AND PASSIVE ACUSICAL TOOLS

EXTRACT

The present invention provides a resonant panel (2) of an acoustically active area (ii), which forms at least a portion of the acoustically active area of the device, which is at least a portion of the bulky surface of the device, provided by the resonant panel geometry and / or bending stiffness parameters. panel (2) resonances generated by natural bending waves and their distribution. The method analyzes the spatial distribution of the natural resonances of the bending waves and the parameter-dependent variations of the distribution in the active area of the resonant panel (2) and then selects, based on the distribution of the natural resonances of the bending waves, parameters corresponding to the acoustic application target and frequency range, and the device we construct the resonant panel with the selected parameters (2).

The present invention further provides an acoustic device, at least one deliberately and consistently acoustically active portion of an area of a resonant panel (2) with a resonant panel (2) extending perpendicular to its thickness, to maintain bending waves, the distribution of resonances of natural bending waves formed in said area. is determined by the values of the bending stiffness and geometric parameter of the area. The selected parameter values result in a specific distribution of resonant modes of natural bending waves suitable and feasible in the frequency range and mode of operation of the device.

(Figure 1)

Representative:

DANUBIA Patent and Trademark Office Kft., Budapest 87237-8071 SE

PROCEDURE FOR DEVELOPING ACUSICAL TOOLS, PASSIVE AND ACTIVE ACUSICAL TOOLS

The present invention relates to a method of providing acoustic devices for acoustic or microphone function, capable of providing at least a portion of an acoustically active area of curved wavelengths extending at least a portion of a surface extending in a direction perpendicular to the thickness of the device, as a reflector, acoustic filter, or acoustic ambient sound means for producing acoustic environmental sounds. a suitable resonant panel having resonant panel resonances generated by the natural bending waves of the resonant panel and / or its resilience and its distribution.

The present invention further relates to an acoustic device having a resonant panel extending in a direction perpendicular to its thickness, at least one deliberately and consistently acoustically active part of the area of the resonant panel, adapted to maintain bending waves, the resonances of the natural bending waves formed in the region of which the bending stiffness and geometry of the area portion are distributed. parameter values.

Conventional and widely used speakers are electrodynamic, electroacoustic transducers, whose conical membrane moves the air to produce sound. The conical diaphragm is moved by an electromagnetic converter, the converter being driven by electric current signals mounted on the back of the central part of the diaphragm, fixed to the fixed frame of the swinging membrane. Acoustic signals on the front side of the conical membrane are in counter phase on the back of the membrane /

with acoustic signals that can block each other, so they must be acoustically carefully selected, the back waves must be extinguished or reversed in order to operate the speaker effectively. The conical membrane is made of a lightweight, rigid material, usually sandwiched to increase bending stiffness. The conical membrane works perfectly when the entire surface of the cone is rigid, moving in the same phase as a piston.

According to a known method, the frequency band of the effect of a speaker piston can be widened by using a rigid cone on a smaller or smaller surface at higher frequencies. In a relatively wide band, good results are achieved with a smaller cone fixed in the middle of a large cone, but the high tones are too directed. Speakers of different sizes are used in the loudspeakers, and the operating frequency range is divided between them with appropriate crossover frequencies. The weight and volume ratios in these solutions are decisive. Sounds in the loudspeaker are tied to the sound source, and the high tones are also heavily steered to degrade the sound. The sound source is dot-like, so the volume is reduced square by the distance from the speaker.

Not surprisingly, in the light of the above, there have been long-standing attempts to create flat surface speakers, flat membranes that would take up less space, emit a less directional sound and would preferably have a lower weight. Many proposals have been implemented. Such a solution is a tensioned film or other flexible material membrane that carries the electric conductor required to drive it. The electromagnetic drive of the diaphragm requires the use of a large-scale, heavy-duty magnet, or the use of a fixed perforated plate electrode and high-voltage electrostatic drive. In the latter case, the available volume is limited by electric arc or spark

I ι

* the possibility of developing a voltage breakage. Such a speaker has a substantially piston effect, the resonances of the bending waves in the membrane cause frequency-shifting transmission roughness, which requires the use of damping at specific frequencies, which in turn impairs the performance of the speaker.

Alternatively, it is suspended in a house by its edges, e.g. a membrane made of polystyrene foam, which acts as a membrane piston. Such a polyplanar commercial loudspeaker uses a conventional, moving coil, electromagnetic converter. On another surface of the diaphragm of the Orthophase commercially available loudspeaker, a plurality of electromagnetic device moving coils are arranged so that the entire surface is in the same phase. Sound Advance Systems of Califomia manufactures various shaped, flat-surface, back-ribbed, polystyrene panels with thinned edges, which are driven by conventional electromagnetic converters and mounted on a motherboard. Bertagni (Argentina) patented a loudspeaker that operates on the principle of a resonant body of a musical instrument: composed of glued and expanded polystyrene spheres of varying thickness and flexibility, mounted on the edges, which basically operates on a piston principle. Japanese Yamaha's large speakers have a thick, polystyrene membrane with ear-shaped suspension along the rim. The diaphragm is conventional, rock-rolled, magnetic driven. The massive magnet and suspension are mounted on a large base plate. The loudspeaker acts as a piston and its sound waves from the rear to some extent eliminate the direct sound waves.

The above solutions are based on the fact that almost every panel is capable of amplifying sounds that have long been known, for example, by placing a wedge or other sound device on a table top or box.

its voice gets stronger. In the 1970s, this theme was the basis for the un Sonance (US 3,728,497) self-supporting electrodynamic device that could be glued or screwed to virtually any surface, e.g. to the bottom plane of a table top. It is not surprising that panels without design and control provided unpredictable acoustic performance with very moderate efficiency. In this way, sound reproduction satisfactory for the device or good quality was not available.

We have some suggestions for sound reproducing devices that make it possible to maintain bending waves. Among the descriptions of such solutions, we found two in which the role of coincidence frequency in voice reproduction is highlighted. The coincidence frequency is the frequency at which the sound velocity in the panel exposed to bending waves is the same as the sound velocity in the air. One of these references is U.S. Pat. No. 3,347,335 (Waters), in which, as described, a composite, light and rigid band is stretched and excited at a frequency so as to provide controlled, one-axis bending waves, and thus a uniform frequency in a frequency band. in which frequency coincidence condition is fulfilled. The above device can be used in the range above the coincidence frequency, i.e., typically in the range of 700 Hz to 2000 Hz, where it provides highly directional sound.

Another literature site (WO92 / 03024) discloses a panel of 1 square meter, which is made entirely of aluminum alloy material. The panel has a honeycomb core that is covered on both sides by a shell. The panel is suspended without damping and is mechanically excited by a vibrator connected to its corner. The panel has a limited acoustic operating range, only recommended for public communication. The operating frequency band in this case is only the band above the coincidence frequency. Bar (

it has a relatively high mechanical efficiency of sound energy reproduction, because of its high stiffness, it requires a high drive power, a very high magnet and a moving coil. Overall, its efficiency is worse than that of a conventional speaker device, and its construction is extremely costly, and its weight is disproportionately large compared to the speaker.

It is an object of the present invention to provide an acoustic device for eliminating the disadvantages of known, most piston-powered speakers, which are also relatively large speaker surfaces and flat.

The invention is based on the recognition that the resonant modes of bending waves in the panel area can be modified and analyzed based on analysis and calculation. I can choose to optimally match the intended use and frequency range that is generated by maintaining standing waves. To achieve this, he needed to overcome many professional prejudices in the design and construction of speakers.

In our solution, materials are used which are suitable for maintaining bending waves and for converting bending waves into sound. The behavior and resonances of the bending waves of two-dimensional panels have been the subject of numerous analyzes and calculations for various purposes. We have found that finite element analysis is particularly suitable for testing bending waves and their operation in panel structures. We have found that such analysis can provide high-efficiency, broadband and compact audio reproduction devices that are clear, understandable, and deliver high-quality audio reproduction. It has also been found that both active and passive acoustic devices can be formed. At the same time, the obvious mathematical tool, statistical energy analysis, was found to be unsuitable for the task.

Our theoretical and practical research and experiments have brought new results. With the resonant panel, the acoustic device constructed according to the invention has an artificial stone (the bandwidth of which is surprisingly large, suitable for generating a sufficiently high sound power as a loudspeaker, and the spatial distribution of the sound is wide.

The solution of the invention according to the invention is a method for forming an acoustic device having a resonant panel of at least a portion of an acoustically active area, which is at least a portion of its bulky surface, which resonant panel is given by the parameters of geometric and / or bending stiffness. resonances generated by natural bending waves and their distribution. According to the present invention, the spatial distribution of the natural resonances of the bending waves is analyzed and the parameter-dependent changes of the distribution in the active area of the resonant panel are selected, then by selecting, the distribution of the natural resonances of the bending waves, the parameters corresponding to the acoustic application purpose and the frequency range are selected, and the device has the selected parameters we build it with a resonant panel.

Preferably, the parameters are two different parameters of the resonant panel area.

Preferably, during the analysis, the vibration energy from a resonant node is evaluated in parts or regions, and the proportion of the parts with relatively low vibration energy is reduced by selecting the parameters.

Preferably, by selecting the parameters, the parts with relatively low vibration energy are minimized.

Preferably, in the analysis, the vibration energy from one resonant node is evaluated in parts or per region, and a more uniform spatial distribution is achieved by selecting the parameters, in the active area, in the natural spatial distribution of the resonances of the bending waves.

The present invention further provides a method for forming an acoustic device that has a resonant panel comprising at least a portion of an acoustically active area, which extends at least a portion of its bulky surface, and resonance modes of the natural bending waves along at least two parameters of the resonant panel. characterized by a characteristic distribution, more active and active, and less active and least active surface parts, which process analyzes the values of the natural resonances of the bending waves, characterized by more active and active, and less active and least active surface parts, and by selecting, for the acoustic application purpose optimally suitable parameters for reducing the less and least active parts to the higher-activity portions, and the device We build it with a resonant panel with selected parameters.

Preferably, the resonant modes and factors affecting their distribution have a first group dependent on the first parameter, and the resonant modes and their distribution influencing factors have a second group dependent on another parameter, the values of the first and second group selected by the selection are relatively active and more active areas are at the expense of less active and least active areas, interacting and feasibly expanding.

Preferably, during the analysis, the frequencies of the resonant modes and their measured distances are determined and the distribution of frequencies is changed in the direction of the optimum that can be achieved by selection.

Preferably, the parameters are associated with at least two principally suitable frequencies associated with resonant modes.

The invention further relates to an acoustically active resonant panel comprising at least a portion of an acoustically active resonant panel extending at least a portion of a surface extending in a direction perpendicular to the thickness of the device and at least two of the values of at least two parameters of the resonant panel for resonance modes of the natural bending waves. . in principle, a suitable frequency can be assigned, in which a resonant mode, which is capable of determining at least two values of at least two frequencies, which are suitable for achieving acoustic properties suitable for the purpose of use, can be determined, which is, in principle, suitable frequency values at the appropriate stages of distributed frequency, suitable resonance and the device is constructed with a resonant panel (2) having the selected parameters.

Preferably, by selecting the parameters, we assure the relationship of the theoretically suitable frequencies to the characteristic frequencies of the natural resonance modes, in which the different frequencies are arranged unequally between each other, stepwise distributed.

Preferably, the principally suitable frequencies are set by selecting the values of the different parameters.

Preferably, the selected parameters are related to the geometric design of the resonant panel and / or the bending stiffness of the different directions.

Preferably, the selected parameters are parameters of the same nature, in proportion to the proportion or percentage of the appropriate frequencies.

Preferably, the selected parameters define geometrically at least the shape of the sub-area in which the resonant panel has a given bending stiffness.

Preferably, the selected geometric parameters define a particular variation of the basic shape according to the different dimensions of the shape.

The present invention further provides a method for providing an acoustic device for determining the geometric configuration of a resonant panel extending in a direction perpendicular to the thickness of a resonant panel to maintain bending waves, the method of resonating the resonances of natural bending waves on resonant panels having different geometric parameter values. wherein the distribution will be different for different territorial configurations and relative parameter values are chosen for which the natural resonant modes correspond at least approximately to the desired mode of operation and frequency range, and the resonant panel of the acoustic device is constructed with the selected relative geometric parameter values.

Preferably, the geometric parameters selected are related to different dimensions of the area.

The present invention further provides a method for forming an acoustic device having an acoustically active resonant panel with a bulky surface in a direction perpendicular to the thickness of the device, in which a geometric configuration of the resonant panel is determined by analysis, at least two resonant waves of natural bending are determined. Frequencies associated with the characteristic frequencies of each mode of operation, which frequencies are interrelated, are correlated so that the given lower frequency, in principle, can be associated with the appropriate frequency, with the associated vibration-active and even more active parts of the area, which areas can be connected to another principally suitable frequency, vibration with the least and least active parts of the area, and the acoustic device The resonant panel, or at least a portion thereof, comprising at least a portion of t or at least a portion thereof is formed according to relative geometric parameters.

Preferably, the dimensions of the resonant panel, which are in principle suitable for determining the frequencies, are determined in different directions of the area.

Preferably, the dimensions of the resonant panel, which are in principle suitable for the frequencies, are determined in the perpendicular directions of the area.

The invention further relates to a method for designing an acoustic device, using a resonant panel designed to maintain bending waves in a given geometric shape, in a bulky direction, in one of two directions defining the rigidity of the resonant panel, defining geometric parameters. furthermore, in practical application of the desired acoustic actuation of the part of the area, it is possible to determine in principle the appropriate frequencies to be associated with the natural bending waves, to determine the appropriate bending stiffness in the above directions, and to use the means for limiting the propagation of the bending waves in the resonant panel, acoustically operating. surface area, then a limited working surface, resonant panel is made as an acoustic device or acoustic and as part of the medium.

The solution is furthermore a method for forming an acoustic device having a resonant panel designed to maintain bending waves in a given shape in a given geometric shape, in a direction perpendicular to its thickness, using geometric parameters defining geometric shape to determine the area's two resonant panel rigidity. in one of the directions of the field, the analysis can be applied in practice to the desired acoustic actuation of the area part and can be associated with the natural bending waves in principle, setting the appropriate frequencies appropriate for the acoustic performance and operation expected from the resonant panel in the above directions. defining bending stiffness and then making a resonant panel of material with a corresponding bending stiffness and texture k as an acoustic device or as part of an acoustic device.

Preferably, only resonant frequency resonant modes with a lower frequency than the upper frequency range are included in the analysis.

Preferably, the defined resonant modes comprise at least twenty natural base frequencies and associated principally suitable frequencies that can be associated with the natural bending wave vibrations of the resonant panel.

Preferably, the defined resonant modes comprise above the initial basic frequencies, the first twenty-five or more resonant modes.

Preferably, one or more resonant modes for adjusting one or more resonant modes are selectively applied to each of the resonant panels or resonant panels.

Preferably, a selective damping element is used at the intermediate point of the acoustically active area.

Preferably, the boundaries of the acoustically active area portion are selected in the same way as the boundary edges of the resonant panel.

Preferably, the acoustic device is formed as a loudspeaker which resonates the resonant panel of the loudspeaker along the lateral edges of the frame with a suitable bending tolerance.

Preferably, the resonant panel in the frame is suspended by a vibration regulating suspension member.

Preferably, the active area of the resonant panel is delimited by a cut-off in the path of the bending waves.

The present invention may be a passive acoustic device formed by the method which is adapted to provide a sound reflector, acoustic filter 12 or acoustic ambient sounds.

Preferably, an electric acoustic transducer is fixed on the resonant panel of the active acoustic device, which is an acoustic active device as a loudspeaker and / or microphone.

The present invention further provides an acoustic device with a resonant panel extending in a direction perpendicular to its thickness, at least one deliberately and consistently acoustically active portion of the area of the resonant panel, designed to maintain bending waves, the resonances of the natural bending waves formed in said area, the dispersion of the area bending stiffness and are determined by the values of the geometric parameter where the selected parameter values result in a specific distribution of resonant modes of natural bending waves suitable and practicable in the frequency range and mode of operation of the device.

Preferably, the parameters are selected in at least two different directions of the resonant panel area.

The acoustic device according to the present invention, in a direction perpendicular to its thickness, is resonant as a resonant panel having at least one deliberately and consistently acoustically active portion of the area of the resonant panel for maintaining bending waves, the distribution of resonances of the natural bending waves formed in that area, more active and active areas, and contains less and less active surface portions determined by the values of the bending stiffness and geometric parameter of the area portion, in which the resonant distribution of the selected parameter values of the resonant panel results in a resonance distribution corresponding to the practically practicable optimum of the device, in which the less and least active surface portions are reduced.

Preferably, a group of resonant modes and factors influencing distribution are dependent on at least one parameter, another group of resonant modes and factors influencing distribution are dependent on at least one other parameter, the selected values of one and the other parameter are more active and even more active parts of the vibration in practice. represent the highest proportion of vibration in less and less active areas.

Preferably, the parameters can be associated with at least two different, in principle suitable frequencies that can be assigned resonance modes for suitable frequencies.

The present invention further provides an acoustic device in the form of a resonant panel extending in a direction perpendicular to its thickness, at least one deliberately and consistently acoustically active portion of the area of the resonant panel designed to maintain bending waves, the distribution of resonances of the natural bending waves formed on said area may be associated with at least two with different, in principle suitable frequencies, which in principle suitable frequencies depend on at least two selected parameters, which resonant panel is in principle selected by the values of the selected parameter defining frequencies, the characteristic frequencies of the resonant modes are alternately spaced apart from each other in accordance with the acoustic properties to be achieved.

Preferably, by selecting the values of the parameters, the principally suitable frequencies are associated with each other, so that the characteristic frequencies of the resonant modes are alternately formed with intermediate spaces.

Preferably, the principally suitable frequencies depend on the selected values of the different parameters in a defined manner.

Preferably, the selected parameter values are selected values of geometric parameters and / or bending stiffnesses for different directions.

Preferably, the selected parameter values are given as a ratio or percentage of similar parameters.

Preferably, the selected parameter gives values to the resonant panel or at least the shape of the active area of the resonant panel at the specified bending stiffness of the resonant panel.

Preferably, the chosen shape of the resonant panel is given with two values of different direction.

The present invention further provides an acoustic device with a resonant panel extending in a direction perpendicular to its thickness, at least one defined geometric portion of the area of the resonant panel being adapted to maintain bending waves, wherein at least the defined part of the area is defined as the resonant modes of the natural bending waves, as expected and desired. is achieved by geometric parameter values that result in an acoustic function and a distribution according to the operating frequency range.

Preferably, the geometric parameters are parameters in different directions of the defined area area.

The present invention further provides an acoustic device in the form of a resonant panel in a direction perpendicular to its thickness, which resonant panel is designed to maintain bending waves, wherein the resonant modes of the natural bending waves determined by the geometric shape of the resonant panel can be associated with at least two principally suitable frequencies such that low frequency resonant modes associated with theoretically suitable frequencies are correlated and divided into at least some of the vibration-active and even more active portions of the area that are resonant modes associated with one of the theoretically suitable frequencies, and less active and least active or equivalent areas, which are they are bound by another, in principle, suitable frequency.

Preferably, the dimensions of the resonant panel, which are in principle suitable for the frequencies, are different along the surface.

Preferably, the directions along the area are perpendicular to each other.

Preferably, the area is perpendicular to each other with longitudinal and width geometric parameters or dimensions, substantially rectangular.

Preferably, in the substantially rectangular area, the bending stiffness of the resonant panel along the length and width is substantially the same, the length and width dimensions differ by 13.4% or 37%.

Preferably, the at least one diagonal corners of the area are of different shape from the perpendicular to the sharp corners, to the extent of the resonant modes resulting from the length and width dimensions.

Preferably, with the degree of deviation, the diagonal bending stiffness is adjusted to 10-15%, which is a diagonal bending rigidity thus approximating the longitudinal and longitudinal bending stiffness.

Preferably, the diagonal bending stiffness of the substantially rectangular area differs from the bending stiffness in the length and width direction to a degree that is advantageously affecting the length and width resonant modes.

Preferably, the area is substantially ellipsoidal, characterized by small and large axes and geometric parameters or dimensions.

Preferably, the resonant panel bending stiffness along the small and large axes is the same, the dimensions of the small and large axles vary by 18.2% or 34%.

Preferably, the area of the resonant panel is substantially super-elliptical in shape, the small and large axes of the shape selected as geometric parameters, depending on the power factor.

Preferably, the area of the resonant panel is substantially super-elliptical in shape, which can be defined as a respective power factor for each relative size of the super-ellipse axis.

Preferably, the resonant panel has substantially the same resonant panel bending along the small and large axis of the resonant panel, the size of the small and large axis is 13% to 22% or 32%, the power factor determined by the shape is 3.5-4.

Preferably, the resonant panel is a composite, common longitudinal axis that extends along the longitudinal axis and perpendicular to the ellipse or super ellipse, or transverse (1.1 to 1.3): 1 to the elliptical area portion, in a large axis direction of 1.2: 1 in proportion to the area of the additional area, the bending stiffness is approximately the same.

Preferably, the resonant panel has different bending stiffnesses in different directions, but similar resonant modes, based on its dimensions, as a resonant panel of equivalent size with an equal bending stiffness in any direction.

Preferably, the similarity of the resulting resonant modes also extends to resonant modes, in principle, suitable for frequencies.

The present invention further provides an acoustic device in the form of a resonant panel extending in a direction perpendicular to its thickness, which resonant panel is designed to maintain bending waves having a geometric shape along its area that produces non-constant bending strength, at least two principally suitable frequencies. , which in principle can be associated with appropriate frequencies of the natural vibration waves of the resonant panel according to the desired mode of operation and their resonant modes.

Preferably, the resonant panel or resonant panels are suspended and damped (provided that the elements are selectively applied in a specific manner affecting the resonant mode at one or more resonant modes.

As a damping means, a damping member connected to the intermediate point of the resonant panel is preferably used.

Preferably, the acoustically active area of the resonant panel is delimited by the edges of the resonant panel.

Preferably, the resonant panel is in a frame suspended in a manner that allows the formation of bending waves to the desired extent.

Preferably, the resonant panel is suspended in the frame by the resonant panel edges and the vibration control hanging member arranged between the frames.

Preferably, the active surface of the resonant panel is bounded by one or more incisions crossing the path of the bending waves.

Preferably, the acoustic operating frequency range of the resonant panel is greater than 4 kHz.

Preferably, the resonant panel has an acoustic operating frequency range including the coincidence frequency.

Preferably, the resonant panel generally has an acoustic operating frequency range below the coincidence frequency.

Preferably, the ratio of the rigidity / unit surface bending to the resonant panel in the resonant panel of the defined size is consistent with the lowest bending vibration frequency below the operating frequency range.

Preferably, the lowest bending vibration frequency is at least 20 Hz.

Preferably, the frequency of the lowest bending vibration is in the lower half of the operating frequency range, preferably in the lower third.

Preferably, the resonant panel has a minimum bending stiffness of 0.1 to 1000 Nm, a maximum of 4-3500 Nm, a unit surface area of at least 0.05 to 1.5 kg / m 2 , up to 1 - 4 kg / m 2 , depending on size and purpose of use.

Preferably, the resonant panel is a light and rigid structure with a laminated sandwich structure, a cellular core, and a core covering shell that is designed to support and maintain frequency resonant modes consistent with the intended use.

Preferably, the cellular core has a shear modulus of at least 10 megaPa, the Young modulus of the adherent shell being at least 1 gigaPa.

Preferably, the area of the resonant panel is 0.1 m 2 or less, the lowest bending wave frequency of 100 Hz or greater, the bending rigidity of 10 Nm or less, the core shear modulus of 10 megaPa or greater, the Young modulus of the shell being between 0.5 and 2.5 gigaPa.

Preferably, the area of the resonant panel is 0.1 to 0.3 m 2 , the lowest bending wave frequency is 70 Hz or more, bending stiffness is 5-50 Nm or greater, the core shear modulus is at least 10 megaPa, typically 15-80 megaPa or more, the Young modulus of the shell is between 2-70 gigaPa, or bigger.

Preferably, the area of the resonant panel is 0.3 to 1 m 2 , the lowest bending wave frequency is 50 Hz or more, bending stiffness is at least 20 Nm, typically 50 to 500 Nm or greater, the core shear modulus is at least 10 megaPa, typically 20 to 90 megaPa or more, Young-modulus 2-70 gigaPa of peel or higher.

Preferably, the area of the resonant panel is 1-5 m 2 or higher, the lowest bending wave frequency of 25-70 Hz, the bending stiffness is typically 25 Nm, the core shear modulus is at least 30 megaPa, the shell has a Young modulus of 201000 gigaPa or even higher.

Advantageously, the core is provided with a frequency-dependent, additional vibration-aiding cell at a higher frequency than the bending vibrations.

Preferably, the core is provided with a higher frequency, compression / tension vibration assistant with a higher frequency than the bending vibrations.

Preferably, the cores of the core sealed with shells are useful for small drums with a high resonance frequency.

Preferably, the resonant panel and its capping form a further useful low frequency non-bending wave resonance system.

Preferably, an electrical signal converter is connected to the resonant panel.

Preferably, the core of the resonant panel (and the converter assembly are further useful low frequency non-bending wave resonance systems.

Advantageously, the actuator of the converter is mechanically coupled to the resonant panel, in particular in terms of resistance.

Preferably, the converter is a piezoelectric converter.

Preferably, the converter is an electrodynamic converter with a magnet and coil.

Preferably, the electromagnetic converter is an electrodynamic converter with a moving coil.

Preferably, the converter is mounted on the surface of the resonant panel.

Preferably, the actuator of the converter is arranged in the cavity of the resonant panel.

Preferably, the conveying body of the converter occupies less than 0.1% of the surface of the resonant panel.

Preferably, the weight of the conveying body of the converter is one to two times the weight portion of the resonant panel covered or triggered by it.

Preferably, the whole of the converter is arranged in the body of the resonant panel.

Preferably, the resonant panel has a substantially rectangular, acoustically active area, and the converter is located in the acoustically active area, from the corner to the side edges of the active area 3/7 and / or 4/9 and / or 5/13.

Preferably, the resonant panel has an essentially elliptical, acoustically active area, and the transducer is located in the acoustically active area, measured from the center to the half-axis and half a small axis, at 0.43 and 0.2.

Preferably, the resonant panel has a substantially super-ellipsoidal, acoustically active area, and the converter is located in the acoustically active area, within its outer edges, at a center line length of 15% of the center point.

Preferably, the analysis is extended to the vibration energy content of the defined natural resonant modes by area and area portions, further defined in the method for at least one location within the active area, which first determines a range within the area that is defined resonance modes. or more than the average.

Preferably, the analysis is extended to the vibration energy content of the defined natural resonant modes by area and area portions, further defined in the method for at least one location transformer (9) within the active area, which first searches for areas within the area that are combined all or almost all of the specified resonance modes are supported.

The invention further relates to a method for forming an acoustic device having a bulky, defined area, resonant panel for maintaining bending waves in a direction perpendicular to the area and area vibration energy content of the defined natural resonant modes according to the method. in the field for a converter wavering a space, in which definition we find a range within that area that supports more than or more than the specified resonance modes.

Preferably, two or more locations in the area are defined for a bending wave converter, which is used to find ranges within the area that together support all or almost all of the specified resonance modes.

Preferably, by analyzing, two or more sites in the area are determined that define ranges within the area that vibrational energies of the domains complement each other in the defined resonance modes.

Preferably, a converter producing bending waves is mounted on the resonant panel to support resonant modes of the area.

The present invention further provides an acoustic device, resonant in the form of a resonant panel in a direction perpendicular to its thickness, which resonant panel is designed to maintain bending waves in which at least one bending wave converter is directly coupled to the resonant panel at least one of the resonant panel geometric shapes. asymmetric location, which is 10-15% downstream of the center of the area.

Preferably, the position of one or more of the transducers is selected from at least 7% of the distance from the center line and the other axes of the area to the circumference.

Preferably, one or more of the transformer sites are located where the resonant modes of the natural bending waves of the resonant panel essentially form a complex and are interconnected.

Preferably, the geometric proportions of the resonant panel are formed with respect to the differences in the resonant modes of the natural bending waves, preferably having regard to the desired acoustic performance.

Preferably, the acoustic device is configured as a microphone, the positions of the microphone transducers in the resonant panel within the active area, at different locations in the area, have different relative values of the coordinates.

Preferably, the acoustic device is configured as a resonant panel-like speaker, the resonant panel of a loudspeaker equipped with a loudspeaker being enclosed and held in the wall panel by a hanging member.

Preferably, a resilient panel is mounted between the resonant panel and the surrounding wall panel or frame box.

Preferably, the resonant panel is provided with a flexible suspension made of elastic material.

Preferably, the converter is fully and exclusively mounted on the resonant panel.

Preferably, the frame boxes are wall-mounted, with a front open part of the box.

Advantageously, the front open box portion at the back is configured to fit into a wall recessed rear box portion.

1

Preferably, a subwoofer is connected to the frame box of the resonant panel-like speaker.

Preferably, the resonant panel-like speaker frame box is equipped with a high-frequency speaker.

Preferably, the acoustic device is configured as a resonant panel-like loudspeaker resonant panel of a speaker with resonant vibration-transducer along its circumference, within the frame supporting the resonant panel, thereby allowing piston-like movement.

Preferably, the resonant panel frame of the acoustic device is part of the resonant panel.

Preferably, the resonant panel suspension member is elastic.

Preferably, the frame has a floor-adjustable stand, which rests on a stand rack that is essentially a vertical carrier extending in the supporting arms of the rack, which are fixed at the free ends of the arms.

The acoustic device preferably has a rectangular speaker resonant panel and the free end of the rack arms keeps the frame in the vicinity of the corners of the resonant panel.

Preferably, the stator of the converter is mounted on or in the rack holder.

Preferably, the stator of the converter is secured in a transducer housing formed on the rack support.

Preferably, the acoustic device has a pair of mutually balanced transducers.

Preferably, the resonant panel of the acoustic device has a lightweight, light core and a high modulus lightweight shell covering both sides of the core.

Preferably, the speaker loudspeaker, with a resonant panel permeable to piston-like movement in a frame box, is resonantly resonant with a resonant panel that is kinetic in relation to the resonant bending waves, furthermore being a means for changing the resonant panel piston-like air pressure.

Preferably, the means for changing the air pressure of the frame box is a bass pump.

Preferably, the bass pump has a sound box, a press speaker in the box, and an interior acoustic pipeline connecting the interior of the frame box to the interior of the frame box.

Preferably, a sound absorbing resonant panel is provided in the frame box and / or in the bass pump audio box.

Advantageously, the converter is a mass-based vibrator, one part of which is a cylindrical roll fixed on a shape-retaining wall, the other part being a magnet magnetically arranged on the coil, movable axially in relation to the coil, and a flexible magnet-fastening element which is fixed to the resonant panel and retaining elements. .

Preferably, the winding wall is rigidly and directly attached to the resonant panel by an adhesive bond.

Preferably, the other end of the resilient magnetic fastening elements secured at both ends of the magnet is fixed to the opposing points of the two-sided shell of the resonant panel.

Advantageously, the two ends of the cylindrical wall cylindrical wall are closed with end plates or hanging plates, the other end of the magnet fastening elements being fixed to the end plates.

Preferably, the coil is fixed on the inner side of the cylindrical wall of the coil holder.

Advantageously, the winding cylindrical wall and the coil are adapted to be secured in the corresponding cavity of the resonant panel.

Preferably, the magnet retaining tongue is provided with an annular groove providing flexible suspension.

Preferably, the annular groove is framed by an annular fastening member.

Preferably, the hanging plates are covered with a disc-shaped magnetically shielding screen from the outside.

Advantageously, the winding cylindrical wall and the coil are adapted for rigid mounting on the surface of the resonant panel.

Preferably, the magnet consists of two disc-shaped halves provided with disc-shaped polar hinges which, on the inside of one of the flanges of the poles, surround the ring of the other on the outside of the flange.

Advantageously, a flexible plunger is placed between the transformer panel side pole and the resonant panel.

Preferably, the magnet is comprised of two disc-like magnet halves, which are magnetically secured with an intermediate air gap filling element.

Advantageously, on both sides of the resonant panel, the push-pull converter faces of two complementary halves, including magnets and coils, are disposed on each side of the resonant panel, facing each other and joined together by a fastener.

Preferably, the transducer is a piezoelectric converter whose piezo panel is adapted to be mounted on the resonant panel to be oscillated, and a substantial portion of the piezolap area is at a relative distance allowing relative motion from the body of the resonant panel.

Preferably, the attachment member of the piezolap is arranged in the center of the piezolap.

Preferably, a sufficient mass of inertia is secured at the edge of the piezo sheet.

Preferably, the device for fixing the piezolap is a light, rigid, resonant panel.

Preferably, the piezolate has a crystal structure.

Preferably, the vibrating transducer resonating with the surface of the resonant panel is a mass-based vibrator having a cylindrical coil fixed on a shape-retaining wall, and a magnet with a spindle-shaped pole arm arranged concentric with the coil and axially movable relative to the coil. externally surrounds the annular coil and is adapted to be mounted on a magnet resonant panel.

Preferably, the magnet is fastened to the resonant panel by a fastener.

Preferably, the resonant panel has an outer thread portion and an inner thread portion of the overall fastener.

Preferably, the fastener further comprises a washer inserted between the surface of the resonant panel and the polar pole on the resonant panel.

Advantageously, on both sides of the resonant panel, the push-pull converter faces of two complementary halves, including magnets and coils, are disposed on each side of the resonant panel, facing each other and joined together by a fastener.

Preferably, the inner thread and outer thread portions of the fastener have a magnet clamping head, and the retaining members of the magnets also comprise sub-clamping fasteners mounted between the resonant panel surface and the resonant panel pole pole.

Preferably, the acoustic device is a loudspeaker.

ι.

Preferably, the acoustic device is configured as a resonant panel-like loudspeaker, the resonant panel of the loudspeaker is provided with resonant vibration, first and second transducers, spaced apart from one another within the resonant panel.

Preferably, the first and second converters are adapted to operate in different frequency bands.

Preferably, the first and second converters are mounted fully and exclusively on the resonant panel.

Preferably one of the converters is an electromagnetic converter.

Preferably, one of the converters is a piezoelectric converter.

Preferably, the acoustic device comprises a resonant panel of the first and second speakers, each of which is provided with a first and a second vibrating transducer.

Preferably, the acoustic device has a second resonant panel fixed to the first speaker resonant panel by a hanging element and equipped with a vibrating transducer.

Preferably, the second resonant panel is arranged in the frame opening of the first resonant panel.

Preferably, the second resonant panel is mounted in its entirety and exclusively on the second resonant panel.

Preferably, the acoustic device is a microphone speaker formed by a resonant panel with a first vibration-transducer and a second vibration-generating transducer emitted by an incident acoustic energy in the resonant panel and responsive to the microphone responses.

Preferably, the first and second transducers are mounted entirely and exclusively on the resonant panel.

»

Preferably, the acoustic device has at least two second transducers.

Preferably, the acoustic device has a response signal-forming converter that detects signals generated by the incident acoustic energy in the resonant panel, which is coupled to the signal-forming input comparing the detected signal with the generated acoustic response signal.

Preferably, the response signal forming unit comprises a receiver and a comparator signal comparator, the comparator signal generator having a digital signal output.

Preferably, the resonant panel of the acoustic device is configured as a panel-shaped microphone with incident acoustic energy in the panel caused by a vibration-sensing transducer mounted throughout the converter and exclusively on the resonant panel.

Preferably, the resonant is provided with at least two transducers in the panel area.

Preferably, one or all of the converters are piezoelectric transducers.

Preferably, the resonant panel of the acoustic device is held in a frame by a flexible hanging member.

Preferably, the frame surrounds the resonant panel and the resilient suspension member is attached to the edge of the resonant panel.

Preferably, the acoustic device is a resonant panel-like loudspeaker or loudspeaker and has a ceiling-mounted panel mounted on the acoustic device as a whole and exclusively on the resonant panel.

Preferably, the resonant panel has a sandwich structure, the cellular core is covered with a high modulus shell on both sides.

Preferably, the material of the cellular core is foamed plastic.

Preferably, the resonant panel of the acoustic device suspended by the frame on the ceiling is held in the frame by a flexible hanging member. Preferably, the acoustic device converter is a mass-based vibrator.

Preferably, the resonant panel of the acoustic device is formed as a visual display board having a display surface for recording sheets of paper, which is mounted on the resonant panel in its entirety and exclusively on the resonant panel.

Preferably, the frame of the acoustic device has a protruding frame portion that covers the flexible hanging member.

Preferably, the resonant panel has a sandwich structure, the cellular core being covered with a paper shell on both sides.

Preferably, the core is made of paper material with a honeycomb structure.

Preferably, the converter is a piezoelectric converter.

Advantageously, the resonant panel has a reflective or light emitting surface, the resonant panel of the resonant panel is mounted entirely and exclusively on the resonant panel.

Preferably, the rigid and lightweight resonant panel has a cellular core having a sandwich structure of aluminum foil, which is covered with a high modulus shell on both sides of the cellular core.

Preferably, the shells are made of fiber-reinforced plastic.

Preferably, on each side of the frame, a further panel-like loudspeaker is provided corresponding to the left and right acoustic channels.

Preferably, the left and right speakers are fixed to the frame on the frame in the frame, hinged on the hinge.

Preferably, both speakers are loudspeakers with resonant panels. Preferably, the surface of the resonant panel enclosed in the frame is a projection screen.

Preferably, the resonant panel enclosed in the frame is part of an audiovisual apparatus.

Preferably, the resonant panel enclosed in the frame is part of an audiovisual apparatus, which is part of an audiovisual apparatus at least one resonant panel backlight.

Preferably, the speaker resonant panel is part of a packing box mounted on the speaker panel converter as a whole and exclusively on the resonant panel.

Preferably, the resonant panel has a sandwich structure, the cellular core of the device is covered on both sides by a strong kraft shell.

Preferably, the acoustic device has a piezoelectric transducer. Preferably, the piezoelectric transducer has a crystal piezole. Preferably, the resonant panel forms one side of the packing box.

Preferably, the sound generator driving the resonant panel converter has a switch arranged for actuation by the lid of the packing box.

Preferably, the converter drive device comprises a sound generator, an amplifier, and an electrical element or battery.

Preferably, the sound-generating acoustic device is part of a greeting card in which the cardboard-shaped resonant panel forms at least a portion of the greeting card which is mounted on the resonant panel in its entirety and exclusively on the resonant panel.

Preferably, the resonant panel has a sandwich structure, the cellular core of the device is covered with a strong kraft shell on both sides.

Preferably, the acoustic device has a piezoelectric transducer. Preferably, the piezoelectric transducer has a crystal piezole.

• ./

Preferably, a switch is provided for switching the greeting card between the cover and the back of the greeting card when the converter drive is opened.

Preferably, the greeting card includes an audio generator, amplifier and a power supply battery or accumulator of the converter drive device.

Preferably, the surface of the resonant panel is adapted to print text.

Preferably, the acoustic device is part of another application device or apparatus.

Preferably, the acoustic device is an integral part of the other device or device.

Preferably, a shell of a resonant panel formed by a cellular core on both sides of the shell forms an integral part of the application device or apparatus.

Advantageously, the shell which forms an integral part of the application device or apparatus is thinner than the average thickness of the corresponding portion of the application device or apparatus.

Preferably, in the appropriate part of the application device or apparatus, a groove acting as a resonant panel boundary and a flexible hanging member is formed.

Advantageously, the resonant panel comprises the outer wall or part thereof of the application device or apparatus.

Preferably, the device is a built-in loudspeaker in a single-screen monitor housing, which is a resonant converter of the resonant panel of the loudspeaker in its entirety and exclusively on the resonant panel (mounted.

• ·

Preferably, the on-screen monitor is an application device, the monitor housing is that portion of the application device that includes the resonant panel.

Preferably, the acoustic device is configured as a loudspeaker for a laptop computer with a screen, a keyboard, and a speaker or speaker having a resonant panel mounted on the resonant panel in its entirety and solely on the resonant panel.

Preferably, the acoustic device is integrated with the screen of the laptop computer.

Preferably, the resonant panel of both speakers on the laptop computer is mechanically connected to the laptop computer.

Preferably, the resonant panel on both sides of the laptop computer is mechanically connected to the laptop computer screen.

Preferably, the two side speakers of the laptop computer are mechanically connected to the screen by a hinge.

Preferably, the screen is disposed in the laptop computer cover, the loudspeakers disposed in the lateral openings of the lid.

Preferably, the acoustic device is a loudspeaker or loudspeaker of a portable CD player having a loudspeaker or loudspeaker having a resonant panel mounted on the panel as a whole and exclusively on the resonant panel.

Preferably, a CD player with a plate disc mounted in its body has a shrouded lid on a disc disk, the lid of which is mechanically fixed to the speaker or speaker.

Preferably, the speakers are hinged to the lid.

Preferably, the loudspeakers are slidable into a lateral nest of the lid.

• ·

Preferably, the acoustic device is formed as a vehicle loudspeaker having a resonant panel and a fixed oscillating transducer thereon. Preferably, the application device is a vehicle with a passenger compartment.

Preferably, the application device is a vehicle with a passenger compartment, the application device having a component comprising the speaker.

Preferably, the speaker unit comprises a seat backrest.

Preferably, the speaker unit is a door lining.

Preferably, the acoustic device is formed as a keypad with an electronic instrument loudspeaker having a rigid and light resonant panel and a fixed oscillating transducer mounted throughout the converter and exclusively on the resonant panel.

Preferably, the application device is the instrument that uses the device comprising the speaker.

Preferably, the lower face of the instrument body of the leg instrument is the part containing the speaker.

Preferably, the speaker panel is arranged in a substantially vertical plane.

Preferably, the resonant panel of the loudspeaker is held in a frame by a flexible hanging member and the frame is fixed to the instrument.

Preferably, the acoustic device is formed as part of a dispensing machine with a throttle mechanism, selector knobs and dispensing window, which has a resonant panel of the acoustic device and a fixed vibration-generating converter mounted on the converter as a whole and exclusively on the resonant panel.

Preferably, the acoustic device is an automatic vending machine that uses an acoustic device speaker or microphone in an application device or a speaker combined with a microphone.

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Preferably, the resonant panel of the applied acoustic device is implemented as a visual display board.

Preferably, the resonant panel of the acoustic device is held in a frame by a flexible hanging member and is integrated into the body of the vending machine by the frame.

Preferably, there is also a microphone transducer in the second resonant panel mounted on the panel to detect the bending waves required by acoustic energy.

Preferably, the acoustic device has at least two second transducers, the response signal-generating transducer detecting the signals generated by the incident acoustic energy in the resonant panel is coupled to the signal-forming input comparing with the acoustic response signal generated.

The following is a detailed description of the invention according to a drawing relating to exemplary embodiments. It is in the drawing

Figure 1 is a schematic front view of an acoustic device formed as a loudspeaker with a drive amplifier;

Fig. 2a shows the section AA of Fig. 1, a

Fig. 2b is an enlarged detail of Fig. 2a, the location of the converter in the panel, a

Fig. 3b is an outline of a regular elliptical panel;

3d illustration of complex shape panel sketch, a

Figure 4 is a schematic view of a distributed mode speaker, i

Fig. 5a is a perspective view of a differently designed loudspeaker;

Figure 5b is a cross-sectional view of the speaker of Figure 5a, a

Figure 6a is a perspective view of another speaker, a

Figure 6b is a cross-sectional view of the speaker of Figure 6a, a

Figure 7a is a front view of a rack speaker, a

Fig. 7b is a side view of the speaker of Fig. 7a, Fig. 7c is a rear view of the speaker of Figures 7a and 7b;

Figure 8 is a sectional view of a subwoofer combined speaker, a

Figure 9: Electromagnetic, electrodynamic converter, integrated into a panel, section, a

Fig. 10 is an electrodynamic converter and position as a separate unit in the panel, a

Fig. 11a is a sectional view of an electrodynamic converter, a sectional view of another electrodynamic converter of Fig. 11b, a.

Figure 11c is a sectional view of another electrodynamic converter, a

Figure 12 is a cross-sectional view of a further electrodynamic converter, a

Figure 13 is a sectional view of a piezoelectric converter, a

Figure 14 is a cross-sectional view of another piezoelectric converter, a

Figure 15 is a cross-sectional view of another piezoelectric converter mounted in a panel, a

Figure 16 is a sectional view of an electrodynamic converter, a

Figure 17 is a sectional view of a further electrodynamic converter, a

Figure 18 is a view of a composite speaker, a

Figure 19: Drive of converters, sketch, a

Figure 20 is a schematic diagram of a common drive for electrodynamic and piezoelectric transducers, a

Fig. 21 drive of two-way electrodynamic converters, a

Fig. 22 drive a speaker combined with a microphone, a

Figure 23 is a perspective view of a microphone of a resonant panel, a

Figure 24 is a perspective view of a crystal plate, piezoelectric transducer, a

Fig. 25a is a perspective view of a wall mounted loudspeaker arrangement; Fig. 25b is a detail of the arrangement of Fig. 25a;

Figure 27 is a perspective view of a built-in speaker, a

Fig. 28 is a structural detail of Fig. 27, a

Figure 29 is a perspective view of a laptop computer with speakers, a

Figure 30 is a structural detail of the speaker of Figure 29, a

Figure 31 Portable CD-Rass-Mounted Speaker Mounted in Speakers, a

Figure 32 is a CD player of Figure 31 in the use position, a

Figure 33 is a structural detail of the speakers of Figure 32, a

Figure 34 is a perspective view of another portable CD player with loudspeakers, a

Figure 35 is a detail of the speakers of Figure 34, a

Figure 36: Vehicle interior with loudspeakers built into the seat backrest, a

Fig. 37 is a structural detail of the loudspeaker backs according to Fig. 36, a

Figure 38 is a perspective view of a car door with a built-in speaker, a

Figure 39 is a perspective view of another car door with a built-in speaker, a

Fig. 40 is a detail of the loudspeaker of Fig. 39, a

Figure 41 is a perspective view of a car with built-in speakers, a

Fig. 42 is a structural detail of the speaker of Fig. 41, a

Figure 43 is a perspective view of a keyboard instrument with a built-in speaker, a

Figure 44 is a bottom view of the speaker of Figure 43, a

Figure 45 is a perspective view of a keyboard instrument with a built-in speaker, a

Fig. 46 is a structural detail of the speaker of Fig. 45, a

Figure 47 is a perspective view of a vending machine with a built-in loudspeaker, a

Figure 48 is a structural detail of the speaker of Figure 47, a

Fig. 49 is a perspective view of an automatic loudspeaker according to Fig. 47;

Fig. 50 is a perspective view of an integrated loudspeaker, a tripod table

Fig. 51 is a perspective view of a hanging table mounted on a ceiling speaker, i

Figure 52 is a structural detail of the tablet speaker, i

Figure 53 is a perspective view of an integrated loudspeaker packing box

Fig. 54 is a perspective drawing of an integrated speaker greeting card

Fig. 55 is a perspective view of a projector with loudspeakers

Fig. 56 is a structural detail of the speaker of Fig. 55;

Figure 57. Arrangement of the speakers of the projection room, in top view, is

Fig. 58 is a perspective view of a resonant panel formed by incisions;

Fig. 59a is a passive passive band-pass switching of a resonant panel with a passive resonant panel;

Fig. 59b is a coupling of a resonant panel with a transmissive active band boundary, Fig. 59c is a frequency amplitude characteristic of a high-pass switch, a piezoelectric transducer coupling of Fig. 59d;

Fig. 60a shows the passive switching of the electrodynamic transducer, a

Fig. 60b is a frequency amplitude characteristic of the circuit of Fig. 60a, a

Fig. 60c is a drawing of a lower band suppressor circuit, a

Fig. 60d shows the frequency amplitude characteristic of the circuit according to Fig. 60c, the radiation pattern of the panel speaker with diffuse sound radiation, the picture of the panel speaker with the focus-radiated, the irradiation of the room with diffuse and focusing speakers.

Fig. 62 is a top view of a five-channel sound system of a projection room, a

Figure 63: Arrangement of passive acoustic devices in a room, a

Figure 64 is a perspective view of a passive panel formed as a shelf, a

Figure 65: Piston-operated speaker with passive resonant panels, a

Fig. 66a is a perspective view of a piano with a passive resonant wall, Fig. 66b is a recording of the loudspeaker of Fig. 66a;

Fig. 67b steps for loudspeaker making.

Our research and experiments were directed towards relatively flat, rigid elements, perpendicular to the thickness, to the behavior of waves, and resulted in a typical complex, natural vibration image. Acoustically important resonant modes with harmonic correlation with elemental frequencies have proved to be important. Each of the resonant modes contributes to the resonance map of the examined element, which resonance map contains vibration nodes (where vibration is maximal) and anti-nodes (where vibration is minimal or absent). We have found that the components of the bending waves of natural resonant modes are combined and superimposed to form nodes and anti-nodes. It has been found that the resulting combinations of natural resonant modes in most cases result in a very poor acoustic performance panel, especially at frequencies excluded by WO92 / 03024, i.e., below the frequencies of the coincidence frequency (lowest possible bending wave). range.

Surprisingly, the criteria of the present invention have been designed and designed to provide much better acoustic performance in a much wider frequency band than with simple panel shapes, as would result from the aforementioned teachings of WO92 / 03024.

It has been found that acoustic performance is adversely affected by the presence and surface distribution of anti-nodes. Acoustic performance is improved by eliminating or reducing these anti-nodes, but it is also advantageous to achieve an even distribution of active nodes and combined nodes. The latter measure, in particular, results in a lower acoustic power increase in the lower range of the coincidence frequency.

This natural variation of the velocity of the bending waves can be accomplished without difficulty by choosing the right material and structure.

It has also been found that the location of the vibration-damaging transducers on the surface essentially determines the vibration image, and that one or more sites suitable for the converter on the surface of the panel are not located on the symmetry lines.

A suitable location for the transducer is one or more coupling sites providing a combined node, practical maximum or optimum, which nodes may also be nodes of resonant frequencies at the bottom of the desired frequency band, which may be implemented by co-operation of more than one converter.

An important criterion is to quantify the frequencies of natural resonant modes and to keep the same distance between frequencies by selecting appropriate parameters (interleaving). The appropriate parameters can be determined by calculation. This avoids or minimizes the effects of extinction on a panel.

Another useful criterion is the correct selection of the shape and proportions of the panel, the location of the converter or transducers for running times between the transducers and the reflecting edges of the panel, so that only small or regular distributed run time differences are generated at the frequencies of the preferred resonant modes. The mode of coincidence is particularly advantageous, where two waves reflected from the edges return with a small and regular time difference, because this results in the rapid recovery of the waves, filling the area, and spreading it rapidly. In addition to the same material structure and rigidity, the dimensions and dimensions of the panel have a decisive influence on the design of the appropriate vibration map. Dimensions mostly affect the lower limit of the application frequency band, they have a decisive role in the frequency of the lowest natural vibrations on the panel, or else they can be assigned to the frequencies that are theoretically suitable for natural resonant modes - including directions differing in length and width. With the proportions, the relative values of the geometric parameters, the acoustically active panel shape is given, which is preferably rectangular, elliptical or super-elliptical in the case of an isotropic bending rigidity panel.

We have found that in the rectangular panel, the longitudinal and transverse geometric parameters are most easily used to describe the distribution of the natural resonance nodes and anti-nodes of the panel, because it is possible to vary the length of the natural waves in resonant nodes and anti-nodes in one dimension (one axial direction). , regardless of the second parameter. This is a rough simplification, which is surprising to our surprise. Such mathematical and computer programs are readily available for such analysis. The programs can calculate and graphically represent the basic and natural resonant frequencies and vibration energies of the various resonant modes for any selected length, in different positions or positions. surface areas. If the calculations are transverse, repeatedly performed by vibration mode, a table or matrix is obtained. The maps of the different modes can be superimposed on each other, and thus different composite maps can be formed, the components of the composite pattern providing a complementary distribution containing active and even more active parts along the axis and less active and least active parts. Of the methods calculated in this way, selecting and superimposing the corresponding ones in one dimension, a preferred distribution can be obtained. Performing both calculations and superpositions in both perpendicular directions, we find some kind of agreement between the active and even more active places of one of the vibration modes, as well as the less and less active places of another mode (and vice versa).

Knowing these matches can reduce the number of coincident sites that create anti-nodes. Preferably, the frequencies of the two selected resonant modes of the composite sample component include the lowest target application frequency, or the lower limit frequency, if preferred.

.1 ·· .41

In principle, the consideration of the largest number of resonant modes gives the best composite result. In practice, a very satisfactory result is obtained by limiting our attention to individually and collectively defined low order resonant modes, such as the first second and third order resonant modes of the theoretically suitable basic frequencies (3 3, perpendicular to each other, in total 9 modes). Preferably, a maximum of five-fifth resonant mode is considered, and the number of variants is twenty-five. If we take seven lower-order resonant modes into account, the maximum of the maximum or optimum reach is the maximum. Instead of using more finite modeling instead of known finite element analysis, additional resonances can be detected, such as diagonal resonance modes and non-bending resonances, especially low frequency oscillations. During the successful development, according to the above-mentioned routine, starting from the lower "theoretically appropriate" frequency, we examined one-dimensional, complex resonances according to a rule in two frequencies of a rectangle at twenty, thirty frequencies, but at least twenty-twenty-five frequencies. The results were very satisfying: they showed a perfectly consistent order, showing a good acoustic performance spreading towards higher resonant modes.

In an interesting and practical way, the optimum of the lateral proportions of the rectangular panel with isotropic bending stiffness has proved to be generally suitable. Such a ratio, which proved to be very effective, is a rectangular shape of 13.4% different from the squares in its side length, where the ratio of the sides is 0.882. 1.134. We used this value many times in our previous experiments. However, we found another suitable shape: the shape of the rectangular panel, the aspect ratio of which is 37% off the square. It is advisable and worthwhile to apply some damping in the lowest resonant modes in this latter form. If we are satisfied with lower acoustic efficiency and / or frequency range, we can find further scales that can be used for specific purposes. They may be suitable, for example, to dampen unwanted resonances, or possibly in the area below the operating frequency band.

It is evident from the above that resonance maps created by the superimposition of the composite patterns described above are not considered to represent the true natural bending vibrations of the particular panel, but rather as a practically usable, approximating modeling. In this image, the actual natural bending vibrations may be more complex and may contain many surprises. For example, the shape of the bending wave actions built on the conceptual basis and the shape of the rectangular panel, the reflections on the edges, corner effects, and damping can interactively interact with each other, which can assist in the formation of transverse bending waves and the advantageous distribution of active and active nodes. While the above effects generally help to achieve the desired acoustic characteristics, thickening the active nodes in higher frequency resonant modes, we have also observed that adverse effects can be eliminated, in part or practically completely. Thus, selective and non-selective corner attenuations can be used, and / or intermediate damping at the appropriate intermediate site or locations of the panel.

There is also a special attention, a diagonal bend resonance phenomenon, which can be described as a preferred refining phenomenon. The diagonal bending resonance generally helps to achieve the desired active acoustic effect and can be easily tuned by breaking the corners. By choosing the shape of the corners, the bending stiffness of an otherwise isotropic bending stiffness can be made anisotropic. A closer look at this phenomenon led to the creation of ellipse and super-elliptical panels, but also to the formation of regular polygon panels. Not so successful, but remarkable refinement is the uneven breaking of the corners and the consequence of this, let us not even shorten the two diagonals. The use of corner chamfering also affects the resulting lateral aspect ratios and therefore cannot be arbitrarily large. Shortening the diagonals in practice cannot result in a shorter diagonal than the diagonal length between the length of the rectangle diagonal and the longer side. The diagonal length may also be expressed as a ratio or a length difference. An advantageous chamfer may be determined by a series of experiments in which the corners of a panel of a given size and scale are incremented in steps and the effect of the steps is evaluated for acoustic and resonant behavior. Only in the case of breaking one diagonal and 13.4% or less. In the case of a rectangular panel with a 37% scale, the preferred degree of angular chamfer (diagonal shortening) is e.g. 15% in one case and 10% in the other case.

We have dealt with the behavior of the natural resonant modes and the distribution of nodes of the rectangular shape with the data described so far, which was done by analyzing the theoretical, one-dimensional bending wave behavior, performing the analysis in both coordinate directions, and combining the measurement results from the surface with a resonance map. We analyzed the influence of page proportions and page sizes on the resonance image, where we tried to suppress and / or combine inactive anti-nodes with active nodes, and highlight, multiply, and evenly distribute the active resonant nodes. The above mentioned several unique and combination aspects. For example, one or more resonant frequencies are lower than the required operating range. We see a broader inventive application in the examination and application of panels other than rectangles, which may be straight-line, such as a flat rectangular, regular or irregular polygon, or parallelogram, or may be curved like a conical portion, radially changing circle shape or super-ellipse. The axes of these shapes are not necessarily perpendicular to each other, and their small and large axes can be formed at different ratios. Therefore, it is necessary to take into consideration1 any arbitrary shape that is beneficial for the complexity of two-dimensional resonant modes.

These tests also include a suitable mathematical method and computer program to determine the natural resonant modes and intensities, plot plot and resonance map with the plotter, and display characteristic data. Characteristics can be observed based on the plotter drawing and the distribution of resonance frequencies can be manipulated.

Such observation and manipulation can be done by varying one, two or more than two parameters, most preferably based on the distribution of the energy content of the natural vibrations, where the area of the imaginary panel is subdivided into small sub-areas and energy contents are assigned to the sub-areas, where we study mainly the changes in energy content and their location. .

Furthermore, by mapping and monitoring the energy distribution, a more direct device is obtained to create an optimal or maximum acoustic efficiency device.

For elliptical shaped resonant panels that are suitable for maintaining bending waves, it is first necessary to determine whether the bending stiffness of the panel is isotropic at least in the direction of its small and large axes, or along its entire surface, and / or generally the resilient natural vibration vibrations are resonant. The direction of its modes differs from the small and large axes, such as hyperbolic, as a function of the circumferential shape. We have found that the role of small and large axes is decisive, especially the ratio of small to large axes. It has been found that the ratio between the large and the small axis of a pure ellipse shape is preferably 1.182 or. 1.34 (interestingly, like in the case of a rectangle, there are two favorable values).

The super-ellipse encompasses extra areas relative to the pure ellipse shape. This can change the ellipse character so much that it is more like a rounded rectangle than an ellipse. There is an additional variable in the expression of the super-ellipse that extends 2n along the length a, b of the large and small axes. The expression expressing the shape of the super-ellipse is as follows:

(X / a) 2n + (y / b) 2n = 1 which has two options: either to determine the optimal a / b ratios for each possible value of n, or to determine the optimal n value for each possible a / b ratio. Calculations were made for a / b ratios between 1 and 2 and η between 1 and 2. In our calculations, we have assumed that the bending stiffness in the whole area is isotropic. Interestingly, we found that the a / b = 1.1 ratio was not promising at all, but the a / b = 1.15 ratio was good:

a / b = 1, 15, n = 1, 9 n = 1.8, a / b = 1.13 - 1.22 or 1.32 yielded favorable results. These values indicate that the result is preferably in the broad range of n and a / b, and even a / b = 1.4 is a useful alternative:

a / b = 1.4, n = 1.37-1.40

An extensive, but essentially routine, task is to carry out analyzes for other n and a / b values, which may provide further useful opportunities, which, as described above, may be advantageous or even more advantageous in super-elliptical form.

We also examined the properties of a super-elliptical surface and a composite shaped surface of a large-axis, real elliptical surface, where the length of the large axis of the elliptical part was 1.1-1.3: 1 greater than that of the super-elliptical part and 1.2. : 1 ratio greater than width. Interestingly, it has been found that in a rule-constrained shape where the length of the rectangular and elliptical shapes and the length of the large axis are uniform, and the bending stiffness being isotropic, a significantly worse resonant acoustic panel can be produced, although the vibrations are excited. The study was instructive in choosing the location of the converter. By choosing the correct location of the converter, we found advantageous resonance map shapes in the rectangular to elliptical range. From an acoustic point of view, there is a beneficial effect on performance asymmetry (and irregularity), especially in the placement of converters or converters. The predetermined, advantageous relationship of the theoretically appropriate frequencies of the different, parallel parameter vibrations may result in combined dead areas and anti-nodes under other conditions and conditions.

We have made a significant finding that the above-described variation in the size and proportions of the shape-determining parameters can be applied in a general equivalent manner to panel panels. According to this, the above analyzes can be used for dimensioning panels, they can be used to analyze bending rigidity anisotropy both. From a practical point of view, perhaps the most interesting is the possibility of conversion, that is, we can determine anisotropy or bending stiffness ratios, which give equivalence between different shapes, i.e., they can be interchanged, different shapes can be determined by conversion. We made our calculations assuming an area with isotropic bending stiffness, but we can also convert our results to anisotropic conditions. In this way, the parameters necessary for acoustic actuation of practically all shapes can be determined, which is not so narrow that complex vibration modes can no longer be created.

Various anisotropies can be achieved by selecting the materials of the panels, choosing different particle sizes or fiber reinforcement, layering. The structure of the acoustically active panel is preferably a laminated sandwich structure consisting of a high-strength shell covering a light core and two sides thereof. For example, the core47 can create anisotropy by forming a sheet of material of different particle size in different geometric directions or by applying an additional layer on one side. There are, of course, core properties such as a shear module, which can have a striking difference in bending stiffness. Instead of breaking the corners, anisotropy of the kind of bending stiffness can be applied between the bending stiffness in the two lateral directions and the diagonal bending stiffness. Another possible way of making the bending stiffness dependent on the direction is to bend the panel in the direction of one or both geometric parameters or relative to them in an angle. The theoretically possible base frequencies that can be set by selecting the parameters are referred to as conceptual frequencies only in principle. The bending stiffness of the bending stiffness can be achieved in many other ways, for example, by changing the thickness of the panel, with transitions between the corners and the center.

By incorporating predetermined differences in bending stiffness, the distribution of the vibration nodes and the masking of the anti-nodes with the active node can be effectively modified.

Another design aspect may be to amplify certain effects according to the invention, suppress other effects to achieve a specific acoustic characteristic. The means of such highlighting, oppression are the reinforcement of the corner reflexes, the approximation of nodes, the creation of an interactive relationship between adjacent nodes, the superposition of nodes of different resonant modes, the bonding of different effects and resonant modes, or the use of general or corner attenuation, local, intermediate attenuation at the resonant area. application. Additionally, modifications can be made to the panel using openings and incisions. A good result can be achieved by distributing the nodes and combined nodes of the different resonances as evenly as possible along the surface and by frequencies, which nodes and combined nodes are limited to low-level resonant modes, for example, in the first three (up to seven) resonant modes, where either in absolute terms one is in principle Suitable resonant modes are defined, with respect to the lower frequency mode, or relative to the lowest frequency mode around or below the lower frequency limit for use, including the preferred consistent effects of the higher frequency operation. Thus, the acoustically useful frequency band can be extended well above the upper frequency limit available in WO 92/03024. One object of the present invention is to overcome the frequency constraints (operating range above the coincidence frequency only) that limit the applicability of the solution according to WO 92/03024.

Resonant panels that have vibration nodes with carefully coordinated, in principle suitable frequencies, distributed across their surface and frequency, are useful acoustic devices per se. One of the areas of application of such devices is the modification and correction of the acoustic characteristics of other acoustic devices such as a loudspeaker or room. Another area of application of such devices is the use of an acoustic filter to filter out disturbing effects in the desired acoustic range. Another possibility is to use such panels to achieve a specific characteristic tone or frequency, e.g. Correcting the acoustic qualities of a room in the room with the dimensions of the room. These applications are called passive applications.

The resonant panels according to the invention can also be advantageously used in active acoustic devices, where a vibrating transducer is used to create bending waves in the area of the panels, thereby producing surprisingly good speakers and speakers. The following shows that the choice of mounting location of the converter has a decisive influence on acoustic performance.

It has been found that there are much better places in the panel area for the panel-mounted converter in a rectangular panel such as the panel corner suggested in WO 92/03024 or the geometric center suggested in WO 96/01547. A similar statement can be made for panels other than regular rectangular or anisotropic bending rigidity.

Searching for a suitable location for the converter was started with a one-dimensional combination wave analysis as described above, which sought and determined the optimal distribution of nodes and antitumor nodes. The advantageous location of the converter has been determined from this: it has been found that the converter is preferably placed therein, where the number of antimony points (inactive sites) is the smallest in the area part. where the number of resonantly active nodes is high or high. In the case of a panel with a certain preferred aspect ratio, for example, with a side length of 15% or less of the square, there are 24 possible positions for the one or more converters, with repetitions and corners, at 3/7, 4/9 and 5/13 relative sides, two or when using multiple converters, it is advisable to arrange the converters at different parameter ratios. The combination of 3/7 and 4/9 is most preferred.

Interestingly, these preferred ratios also apply to resonant panels of a different scale and substantially rectangular. These advantageous ratios can also be applied to the requirements of the above aspects, for example, to non-advantageous scale and damped or anisotropic panels, the movement path of the panels being limited to an energy level beyond which the converter cannot be excited, for example due to the internal friction of the panel material. However, the acoustic performance of such panels is less than .1 from the optimum. As a speaker, such panels can also be used advantageously, taking into account the aspect ratio of the converter, with the converter positioned relatively close to the corner. For rounded or broken corners, the reference point is the unbroken position of the heel (intersection of the straight edge). This means that the converter should preferably be positioned at least 5/13 or 38% of the edges of the edges. In practice, acoustic performance is surprisingly improved in terms of clarity, even with the use of marginal and lossy materials, material structures, at least in comparison with known speaker panels at the center or at a corner. Further, the tolarities for the location of the transducer, described below, provide additional security in the correct application, since the optimum location can be influenced by changes in a number of factors, which are so large that they cannot be exhaustively analyzed.

The teaching of the new criterion according to which the converter must be at least some distance from the edge of the panel is not even indirectly included in the prior art literature.

In general, it is not only possible to determine the appropriate location of the vibration transducer by analysis, but also the appropriate location of the frequency-selective attenuation that may be applicable, depending on the appropriate location of the oscillator.

In the case of a real elliptical resonant panel, the main series of small and large axial resonant modes are elliptical and hyperbolic (as already mentioned), the ratio between the large and small axis of the optimum shape is 1.182 and. expressed in coordinate position on the small and large axes of origin from 0.43 to 0.20. It should be noted that the orthogonal coordinates are not well suited for general application, the expression of elliptical shapes with different parameter values or anisotropic bending rigidity and generic Cartesian coefficients with trigonometric correlations can only be formed in the center of the converter location, in the elliptical or circle coordinate system.

In the case of substantially rectangular panels, more precise analysis or experiments can be used to determine possible refinements, which can be improved, and even more so the resonant nodes can be installed on the dense. The efficiency of the operation of each converter depends to a large extent on how many resonant modes its nodes are able to associate without adverse side effects.

The locations for the above-mentioned converter installation are not on the center lines of the quadrangular shape and are slightly out of the line of the diagonals, so they are completely asymmetric. Elements of the elliptical panel converter suitable for installation are outside the large and small axes. The relative coordinates of the locations suitable for the converter installation do not change due to the anisotropy of the bending stiffness or the rectangular panel depending on the rectangular coordinates of the sides.

In summary, for elliptic and quadrangular panel forms, the suitable location for the at least one converter, asymmetric for better coupling with different vibration modes, and off-center location on the center lines, typically features: longitudinal and longitudinal from centerlines 7% -12. at a distance of about 20%, or about 20% of the center, along the axis, at 10% of the small axis.

Surprisingly, in the case of a super elliptical panel, it has been found that the suitable location of the converter is closer to the value determined for the circular panel than the value for the rectangular or elliptical panel. In the case of a super-elliptical panel, the suitable location of the converter is on a self-contained line extending at a distance of about 70% of the center-to-circumferential distance from the center. For rectangular and elliptical shapes, there are many suitable places for the converter, but not for the middle or axis lines.

When the panel mounted with one or more transducers is used as a speaker loudspeaker, the entire surface of the resonant, evenly distributed, maintaining the bending waves from the converter to the edges throughout. The sound thus generated is not necessarily, or at least not, directed but directed. This sound mode, where the sound is generated on a large surface, does not produce such an inexpensive directional, punctuated sound and distance-dependent loudness as traditional, conical speakers, and consequently its speech intelligibility is significantly better than more directional broadcasting. for traditional speakers. A further advantage of the loudspeaker or speaker according to the invention is that, apart from the deepest sounds, the sounds emitted on the back of the panel are also useful, there are no counter phase problems.

converters

Most commonly used vibration converters are electrodynamic converters and piezoelectric transducers. The electrodynamic transducers are capable of high-performance, high-quality sound reproduction, and piezoelectric transducers are suitable for narrower frequency bandwidth, lower power, lower quality sound, generally used in subordinate locations or as a high-frequency speaker. The electrodynamic transducer is a coil moving in the air gap of an electromagnet or a permanent magnet with a sound frequency current. Regardless of whether the magnet or coil moves an acoustic membrane, since the coil is of less weight, the stator of the converter is the magnet. The electrodynamic converter used to generate bending waves in the panel according to the invention was designed and tested by weight and size matching considerations. The size of the dynamic coupling of different frequency waves depends on the size of the wound on the panel, so the size depends on the application frequency (frequency) and its width. According to the results of theoretical, approximate examinations, the converter cannot cover more of the panel area than 7% -10% of the linear size (length, width, large or small axis) of the panel, ie 1-2% of the area you cannot have more than one converter. According to a practical criterion, the area occupied by the converter can only be as large as the bending waves of frequency-dependent wavelengths from the transducer at each frequency. The moving mass of the electrodynamic transducer, including the magnet, should not be more than 1 to 2 times the weight of the part of the panel removed from the panel to accommodate the converter.

Additional structural factors

At the corner of the panel, acoustic operation under the base frequency is generally permissible, i.e. movement of the corners of the panel on a suspension allowing free movement. Such movements may result from the mounting mode of the converter, such as the flexibility or resistance of the magnet between the magnet and the moving coil, and may also be useful at low frequencies. From the point of view of the end result, it is irrelevant that these operations below the base frequency result from changes in the effective area of the panel or from an additive piston effect, which is important in influencing the acoustic overall performance.

The acoustically effective area of the panel is not always the same as the area bounded by the physical dimensions of the panel. A panel may be much larger or of a different proportion than the one required for acoustic operation. Can be defined within the larger panel and by changing the panel structure, ribbing, rigid clamping of the large panel, incisions

.. (delimiting the acoustically active surface portion, the resilient panel portion may be resiliently attached to the large, inactive panel by the active panel portion).

Many different materials can be used to make an acoustically active panel for maintaining bending waves. An acoustic device panel in the form of an active speaker, loudspeaker, or loudspeaker can be a card-sized, laptop-sized cover, can be a ceiling panel or a large, good-to-speak, public, loud bulletin board, can be a home theater system or a hi-fi system as a speaker system. can be made of one or more speaker parts. Suitable speakers for different applications are preferably made of different materials with different panel structures. The panel structure is generally composed of light, honeycomb or other cores with a shear-resistant structure and high tensile, or multi-layered shells covering the core on both sides, glued to a sandwich structure. The shear-tightness of the core influences the losses and attenuation occurring during the spread of the bending waves, so the degree of shear stress depends to some extent on the size of the panel. The shear-tightness and the bending stiffness required from the panel depend on the expected acoustic performance or even more on the maximum drive performance, with a low-load (non-sandwich structure) fit. Dimensional accuracy requirements for a large acoustic panel are very large, both in terms of panel size and converter location. Scaling with approximately 3% accuracy, the required location of the converter is about 5% accuracy, greater inaccuracy of between 5 and 10% already results in a significant loss of efficiency and output loss.

The resonant panel speaker can be combined with a conventional conical speaker speaker so that the panel can be combined with a subwoofer, subwoofer or speaker. Thus, the most sophisticated, high-end audio reproduction can be achieved. The panel can also carry the piston movement itself in an appropriate combination. A single panel can also provide surprisingly wide-bandwidth audio reproduction, such as a resonant panel suitable for sound broadcasting at 50 Hz or 100 Hz to 15 kHz, up to 25 kHz or higher. The resonant panel emitting a bandwidth greater than 4 kHz can be implemented without difficulty.

In these relationships, or even in a single panel, many variables are optional. The coincidence frequency can be placed at the bottom, top, or intermediate band of the operating band, selectively suppressing or suppressing certain frequencies in the operating band with an electronic equalizer, which can be implemented more easily, such as constructing a three-way speaker and supplying it with frequency inverters, using resonant panel speakers. un box box, which is inevitably a feature of most speakers. The sounds emitted from the front and back surfaces of the panel are not in opposite phases as in the case of a diaphragm of the speaker, so the path of the rear sounds need not be closed, the panel is usually not required to be enclosed in a box, and the panel speaker can be mounted directly or on a small wall with a rigid wall.

Designing a resonant panel is a multifaceted, complex task that requires interactive methods and decisions. Decisions are usually compromise on both physical and operational parameters and requirements. The bending stiffness (B) and the mass per unit area (μ) are given by the area or area. In terms of dimensions, it affects the frequency of the lowest natural bending waves, in proportion to the square root of Β / μ. The Young modulus (E) and the thickness of the shell, and the square of the thickness of the core, determine the rigidity against the bending waves.

The square root of μ / Β and the square of the sound speeds (in the air and bending waves in the panel) determine the coincidence frequency, the shear modulus (G) and the thickness (d) of the core are related to the μ / Β ratio, the mass per unit area (μ) is particularly influenced by the value of the coincidence frequency, which coincidence frequency is always higher; like a simple calculation that does not calculate the shear of the core. Increasing the above ratio reduces the coincidence frequency.

The core shear modulus (G) is a significant design factor in itself, the task of the core being to hold the two-sided shells with sufficient stiffness at a given distance from the bending waves. The lower or higher value of the shear modulus greatly influences the ability of the converter to transmit vibrations to the panel. The shear waves do not emit any sound, the net acoustic performance in the case of a smaller shear modulus will be smaller and, depending on the frequency, the acoustically active resonant area will be smaller (which is always greater than the active radius of a cone speaker). The effect that shear demand is a frequency-dependent deterioration in wave propagation can also be utilized in some cases, for example, when a piezoelectric converter is used on A5 or A4, or Al-size cardboard, notebook, or book, where the coincidence frequency is about 20 kHz, but at the same time the frequency range of the sound is from 200300 Hz to 15 kHz, and the lowest resonant mode frequency is also between 100-250 Hz.

The mass per unit area (μ) is inverse to the speaker efficiency, so its value should be kept as low as possible, i.e. preferably a high bending stiffness / mass ratio should be established. In general, these layers, most often the lightweight, shiny core, and the large tensile shell covering it on both sides, correspond to the most complex layered sandwich structure. Such hard core materials generally include hard foam plastics and honeycomb structures made of sheet metal, which are hollow-cavities of a honeycomb panel as a row of small drums, as resonant cavities. Such resonant cavities can increase the acoustic performance of the panel mainly at higher frequencies of 19 kHz to 22 kHz.

It may also be a scaling aspect if the acoustic requirements do not determine the size of the panel to be made, so different shear modulus with anisotropy must be counted in different coordinate directions. In such a case, it is also suitable to be suspended flexibly in an appropriate opening of the large panel, acoustically active, resonant panel, or otherwise limited and separated by the active area.

An acoustic device with a resonant panel with a converter can also be used as a microphone. For this purpose, it is advantageous to use a plurality of converters in the panel for converting the bending vibrations into an electrical signal in order to detect and process the panel vibrations as fully as possible. Such a reversible or inverse acoustic device can be used, for example, as a data processing device for voice data input and understandably reproducing. The same device may also act as a loudspeaker and microphone, but is preferably arranged in a combination of different transducers, different panels of the same panel, for audio recording and speaker purposes.

Previously, two widespread versions of the transducers were mentioned: the electrodynamic and the piezoelectric transducers. We have also mentioned that the converters have traditionally a stator and a moving part. A surprising new element in the use according to the invention is that both parts of the converter that move relative to each other in the panel are gripped, moves both surfaces of the panel with mass forces, so that practically no piston movement-like movement moves from a fixed point to bending waves. in the panel area. In addition to the resonant panel, a movable part of the stator converter mounted on a frame, which moves the panel in addition to the resonant operation, is piston-like.

The acoustic device according to the invention can be called in several ways according to its operation: it can be called a distributed mode resonator, a resonant panel, a multimode resonant panel or a distributed mode speaker, a speaker. The resonant, resonance word in these terms is a simplified term of special meaning: a set of bending vibration waves of a natural, natural resonant mode, not to be confused with the general and other meanings of the resonance word.

When describing the drawings, the same function elements of the various embodiments are denoted by the same drawing symbol. Fig. 1 is a schematic view of a typical embodiment of the acoustic device according to the invention, the acoustic device being a speaker, distributed mode, 2 resonant panel suspended in the frame 1 by means of 3 hanging elements. A converter converting an electrical signal into a vibration at an appropriate location in the panel area (see FIG

9th-17th Figs. The converter 9 is mechanically coupled to the resonant panel 2 only, no stator portion fixed to a frame or other fixed point. The mounting position of the converter 9 is indicated by coordinate x, y distances, dimension gauges measured from the edge of the panel. In the case of a particularly rounded, broken corner (dashed lines) rectangular panel shape, it may be advantageous to use coordinates through the center instead of the coordinates passing through the corners, to which said distances x, y may be converted. Fig. 1 shows the diagonal values of the bending stiffness against bending waves with arrows V, W, circumferential values with arrows C, D and arrows in other directions with arrows E, F, G, H.

The converter 9 excites the bending waves in the area of the panel 2 by driving through a pair of amplifiers 28 and a pair of wires, which are the sounds of the resonant panel practically throughout. The speaker 81 of the speaker 81 has a sensitivity of about 86 to 88 dB / watt, which is similar to the sensitivity of conventional speakers, so it is necessary to drive 2 resonant panels in the order of magnitude as a conical speaker. The amplifier 10 has a power of 6 ohms impedance of 20-80 W. The panel made of metal sheet can also serve as a cooling surface for the converter 9. The damping element 2P, indicated by a dashed line at the back of the resonant panel 2 of Figure 1, may be arranged (discussed in more detail later).

Fig. 2a is an exploded view of the sectional line AA of Fig. 1, illustrated in Fig. 2b, with two portions thereof. In the portion shown in Fig. 2a, a section of the circumference comprises a frame 1, a resonant panel 2, and a suspension member 3 which is mutually permeable to movement. The hanging member 3 is bonded to the frame 1 and to the resonant panel 2 by glued joints 20. The frame 1 is similar to a frame, preferably made of extruded aluminum alloy profile profiles, and frames the resonant panel 2. The material of the suspension element 3 is, for example, a flexible plastic or rubber foam. Binders of the bonds 20 include, for example, epoxy resin, acrylic or cyanoacrylate adhesive.

Figure 2b is an enlarged sectional view of two types of resonant panels.

The structure of the resonant panel 2 is a sandwich structure of light, rigid structure 22 and a shell 21 covering both sides of the core 22. The material of the core 22 may be e.g. a rigid foam foam 97, or a matrix-like honeycomb structure of thin plate-like cell walls 98. The material of the shell 21 may be a metal foil, a metal sheet, a cardboard, a plastic sheet, a fiber-reinforced plastic film, and the like. The plastic shell reinforcing fibers may be carbon fibers, glass fibers, kevlar, nomex, aramid or other known reinforcing fibers. Preferably, the shell is a single or multi-layered material of paper, laminated paper, melamine or other high modulus plastic film such as mylar, kappa, polycarbonate, phenolic polyester or other similar plastic or reinforced plastics. Our experiments with the vectra material have shown that it can be made of an ultra-thin film suitable for use as a panel shell up to a diameter of about 30 cm. This material itself forms reinforcing fibers in the direction of injection, which provides a favorable rigidity in the propagation of the bending waves.

The bending stiffness may be different in different lateral directions (coordinate directions). (C, D arrow, Figure 1), can be different in one direction (arrow E, F,

Fig. 1), may be of different directions and relative to the coordinate directions e.g. 45 ° in various layers of the shell (arrows G, H, Figure 1). The shear modulus of the core 22 is also often different in different directions depending on the material structure.

in molded or molded plastic panels, a simple nest or nest marking depressor for the converter 9, which helps to accurately position and assemble the converter 9, with some weaker core materials, it is desirable to increase the thickness of the core 22, e.g. about 15% of the diameter of the converter. This makes the coupling between the converter 9 and the panel 2 more efficient, broader, and facilitates the formation of bending waves in the body of the panel 2, allowing greater energy transfer. Higher frequency behavior can be improved by using specific foam materials.

Suitable materials for the core include, but are not limited to, aluminum-alloy sheet or foil (made of ribbed or honeycomb wall structure), Kevlar (RTM), nomex (RTM), bare or metallized paper, various synthetic plastic films, expanded or foamed plastics or pulp materials, aerogel metals with a sufficiently low density. There are some core materials that are skinny or otherwise form a high-strength surface that eliminates the need to apply a separate shell layer. A high-performance cellular core material is commercially available under the trade name 'Rochacell'. This layer can be used to make a resonant panel without a separate layer. The aim of the panel design is to make the resonant panel as light and rigid as possible, which can be achieved by a coordinated choice of material and structure of the core and shells.

Many metallic materials or carbon fiber reinforced materials have a radio frequency shielding effect and can advantageously be used in many electromagnetic applications. Conventional speakers and acoustic panels are not suitable for electromagnetic shielding.

To complement and summarize our previous review, we list some of the criteria we've developed for material selection:

a) the shear modulus of the cellular core structure is at least 10 mega-patches (megaPa), and the Young modulus of the shell is at least 1 gigpas (gigaPa);

b) 0.1 m 2 for smaller resonant panels if the lowest bending frequency is approx. 100 Hz, bending rigidity may fall below 10 Newton meters (Nm), the shear modulus of the core may be 0.5 to 2.5 gigas (gigaPa),

c) for resonant panels of 0.1 to 0.3 m, if the lowest bending frequency is approx. 70 Hz, bending stiffness is 5-50 Nm or more, the core shear modulus is 10-80 megaPa, typically 15 megaPa, the shell's Young modulus is at least 2 gigaPa, but can be 70 gigabytes or more,

d) for a resonant panel of 0.3 - 1 m area, if the lowest bending frequency is 50 Hz, the bending stiffness is 20 - 500 Nm or more, typically 50 Nm, and the core shear modulus is 10-90, typically 20 megaPa, shell has a Young modulus of at least 2 gigaPa, but may be more than 70 gigaPa

e) For a resonant panel between 1 and 5 m, the lowest bending frequency is 25-70 Hz, the bending rigidity is above 25 Nm, the shear modulus of the core is generally above 30 megaPa, the Young modulus of the shells is at least 20 gigaPa, but may be more like 1000 gigaPa,

(f) generally a minimum bending rigidity of between about 0.1 Nm and 1000 Nm and a maximum of 4 Nm to 3500 Nm, with a minimum unit mass of 0.05-1.5 kg / m per unit area 2 with a maximum of 1 to 4 kg / mA 3 may be formed to damp the movement of the corners of the resonant panel, preventing extreme high movements without limiting its acoustic advantage. A 2P damping element may also be used at the intermediate site of the resonant panel 2, e.g. in the form of a stick attached to the surface of the panel by gluing, the 2P damping element at one or more bending vibration modes, selectively attenuates the vibrations, thereby helping to uniformly distribute the vibration modes in the area. The damping element 2P may be a bitumen-based material conventionally used for loudspeaker making, or may be a flexible or rigid polymer layer. There are materials such as paperboard, which in itself has a damping effect. Where necessary, damping can be increased by using a resilient element instead of a rigid stump-like damping element.

Effective and selective damping can also be achieved by applying appropriate shell layers. Edges and corners are particularly important for dominant and low-spread, low-frequency vibration modes. By applying damping devices to the edges, the resonant panel can also be framed, although it is advantageous to expand to low frequencies if the corners of the corners remain relatively free. The method of attachment of the damping element is usually adhesive or self-adhesive. Suitable for damping mainly medium and high frequency resonant modes is a weight fixed at an intermediate point of the panel.

An acoustic, resonant panel is clearly bidirectional with respect to sound. The air waves of the back sound are not in close contact with the front-side radiation, so they do not extinguish the front air waves, the sound energy emitted on both sides of the resonant panel is utilized as sound energy. The advantage of this is that the two-sided acoustic performance is summed up in the room, the distribution of energy does not change as a function of frequency, the reflections and standing waves are smaller. Sound reproduction is thus distorted, natural, and well understood.

Although the speakers of the resonant panel speakers are essentially non-directional, there are phase-dependent information portions, the amount of which increases with increasing angular deviation from the perpendicular axis. This side effect can be reduced by placing the speaker panel at head height, thereby increasing the stereo effect of a stereo device's sound. Even when using non-directional speakers, the stereo directional effect prevails according to the known two-speaker triangle connection.

The use of resonant panel speakers also has an additional advantage, especially when more people listen to the sound. The intensity of the sound from the panel radiating on the large surface changes less with the distance than the sound coming from a point source (conical speaker such!). Thus, the stereo effect can not only be enjoyed at one point of the room, but in a relatively large area of the room, a student sitting closer to one of the speakers does not suffer from the difference in intensity between the right and left audio channels. The human ear is more sensitive to the incoming sound than to the incoming one, which is not disturbing in conventional speakers only if they are at the same distance from the listener.

A panel may be larger than the acoustically active resonant portion, the acoustically active portion should be separated from the inactive portion of the panel. This can be done by converting the area of the inactive panel portion to a different bending stiffness than the active resonant panel area, or employing 22C incisions (2a, 2b) in the core 22 through the shell 21, or an additive stiffening or 22S damping element may be used. as an internal frame or frame part.

3a shows a preferred location of the converter for a rectangular 2 resonant panel. The panel's isometric C / L ratio is 1.34: 1 at the side length of the side, at the 3/7, 4/9, 5/13 part of the rectangular coordinate. Each of the six crossing points shown in Figure 3a is a preferred location for a converter. In Figure 3a, only one corner environment is depicted, the locations of the additional three corners are the same as those depicted. Selected crossing points are possible locations of the center of the converter, you can choose at which point or points you place the converter.

Figure 3b shows an ellipse-shaped resonant panel 2 and a preferred location of the converter 9. The ratio of the coordinate dimensions of the ellipse shape is 1.182: 1, the preferred position of the converter 9 is from the center to the large axis 0.43, and the small axis is 0.2. Expressed as Elliptical Cylindrical Coordinates:

0.33666 and 0.239π, if x = hxcos h (uxum) xvos (v), where h = \ t í (the 2 -b 2 ) u = (0 ... 1), y = hxsin h (u x um) xsin (v) um = qxtan h (a / b), v = (0 ... π / 2)

3c is a super-elliptical 2 resonant panel shape, Fig. 3d partially showing a super-elliptical 2 resonant panel shape and a panel location 9 converter advantageous location.

Figure 4 shows a possible embodiment of a speaker 81 constructed with a resonant panel 2. This embodiment is essentially the same as that of FIGS

2a, but in this case the frame 1 is a wall panel 6, i.e. a medium density fibreboard having a rectangular opening 82. In the frame opening 82, the distributed mode 2 resonant panel is gripped by an elastic threading member 3. The use of the wall panel 6 is advantageous at the lower sound frequencies of the transmission band and when the resonant panel 2 is to be located in the immediate vicinity of a wall. The converter 9 may be configured according to any one of Figures 9 to 17, the converter 9, which causes the bending waves, is mounted solely and completely on the resonant panel 2 (independent of the wall or other fixed point).

The loudspeaker 81 of FIG. 5a, 5b has a flat frame 8. The upper side wall 148 of the frame boxes 8, the lower side wall 149, the two side walls 150 and the back wall 151, are closed by an open front side 152 with a resonant panel 2, resonant to the rim of the frame box 8, resilient, e.g. latex rubber 17 gripped. The resonant panel 2 (Fig. 5b) is a sandwich structure consisting of 22 cores and two shells 21 on the inside of which is mounted on the inner side of the frame box 8, the converter 9. The frame box 8 can be formed as a bass reflex box, in which case the acoustic opening 109 is formed in the side wall 150.

The loudspeaker 81 of FIG. 6a, 6b has a wall-mounted frame box 8, which is closed by an open front side portion of a resonant loudspeaker 51 with a lightweight and high bending stiffness in the front box portion of the frame box. The front box portion 52 can be fixed to the wall by means of tongue tabs. The resonant panel 2 (Fig. 5b) is a sandwich structure consisting of 22 cores and two shells 21 on the inside of which is mounted on the inner side of the frame box 8, the converter 9.

The advantage of this solution compared to the previous example is that the speaker 81 hardly protrudes from the plane of the wall. The resonant panel 2 (Fig. 6b) is a sandwich structure consisting of 22 cores and two shells 21 on the inside of the shroud having a frame box 8 mounted on the inner side of the shroud. The converter 9 may be configured according to any one of Figures 9 to 17, the converter 9, which produces bending waves, is mounted on the resonant panel 2 in its entirety at the location described in Figure 3 (independent of the wall or other fixed point).

Such loudspeakers can be produced relatively simply and with a small construction depth at a lower cost and less box depth than conventional speakers.

Figures 7a, 7b and 7c show different views of a rack 81. The structure of the speaker 81 is essentially the same as that of Figures 1 and 2. The resonant panel 2 is a distributed mode speaker panel, which is provided with a flexible suspension element 3 in a rectangular frame 1, allowing for movement. The frame 1 has a floor-adjustable stand 23, the main parts of the stand 23 being a tripod base 83, a column-like holder 84 vertically protruding from the stand 83 and extending from the carrier 84 to the arms 85 ', 86' extending laterally and slightly forward of the frame 1; towards the 87 corners of the frame. Two transducers 9 are connected to the resonant panel 2, on which the transducers 9 on the other hand are mounted on the mounting brackets 88 of the frame 84.

The transducers 9 are disposed symmetrically in the area of the resonant panel 2, apart from its center lines, but at the center of the panel, and are used for low frequency, piston-like movement of the resonant panel 2, while at higher frequencies in the resonant panel 2 they produce bending waves. The hanging member 3 is similar in design to a wavy hanging member of a conventional conical speaker, with motion-waving circles along the edge of the resonant panel 2. Such loudspeakers can be produced without any problems, they occupy a small space in depth and the direction of their sound is very large.

Figure 8 illustrates a solution for combining resonant and piston-like sound with a different design. The light and high bending resonance panel 2 of the speaker 81 of Figure 8 closes the front side of a frame box 8. The frame boxes 8 have 12 housing walls and 135 side walls. The material of the frame box 8 is a medium density plywood. In the cavity 135, a sound absorbing material panel 5Γ is provided to at least partially absorb the standing hams. The resonant panel 2 is provided with a flexible suspension 7, which also allows the movement of the frame box, to the rim of the frame box 8. On the inner side 135 of the resonant panel 2, a converter 9 is fixed at the corresponding location of the area. The converter 9 is mounted on the elastic panel 2 only and is not connected to other fixed points. In the resonant panel 2, a pair of wires 9, which cause bending waves, are connected to the output of the amplifier 10 of the drive.

In the inner cavity 135 of the frame box 8, an acoustic tube 90 of a bass pump 11 is discharged. The bass pump 11 is a conical, compressed loudspeaker 42 disposed inside a closed box 185, which is also connected to the output of the amplifier 10. Behind the loudspeaker 42, the panel 5Γ is provided with a material for absorbing standing waves in the voice box 185. The acoustic pressure waves generated by the loudspeaker 42 force the cavity passage 135 behind the resonant panel 2 and the resonant panel at low frequencies to piston-like motion. At the same time, the converter 9 produces bending waves in the resonant panel 2, which is mainly applied at higher frequencies, so that combined sound is generated in the resonant panel 2.

Fig. 9 is a moving light68 falling into a magnet magnetic field and driven by a current in the magnetic field of an extremely light 2 resonant panel, an electrodynamic transducer 9 is shown schematically. The transducer 9 is fully located within the core 22 of the resonant panel 22, in a suitable cavity 29 formed in the core 22 and secured to the shells 21 on both surfaces of the core 22. grasping. The roller 13 is secured to the outer shell of the cylindrical wall 18, which is a coil-forming epoxy resin 16, which is coaxial with the thickness of the core 22, and is cylindrical with the joint 16 and 16 attached to both shells 21. In the space enclosed by the cylindrical wall 18, a flexible sandwich structure 15 is provided, coupled to one of the two shells 21, comprising a pair of magnets 15 and an intermediate air gap filling member 14. The fastening elements 19 may be, for example, foam rubber pots, which are bonded to the inner surface of one shell 21 on one hand and to the free surface of one of the magnets 15, so that the magnets so attached are able to move relative to the coil 13 and the wall 18 and locally vibrate with motion. 21 shells are elasticly deformed and thus produce bending waves in the resonant panel 2. The relative movement between the coil and magnet of the converter 9 is transferred to the resonant panel 2, depending on the ratio of the magnet and the seed mass traveled and the frequency of the vibration: the magnet remains virtually stationary at higher frequencies and the coil 13 moves together with the portion of the core 22 around the wall 18 together.

Fig. 10 illustrates a converter 9 and a manner of installation similar to that of Fig. 9, except that the converter 9 forms a complete, built-in unit, as opposed to the solution of Fig. 9, where the construction of the converter 9 is forced. it can only be done during the construction of the 2 resonant panels. Fig. 10 is also incorporated into a cavity 120 of the core 22 of the resonant panel 2 in its complete state.

In this case, the coil 13 of the converter 9 is fixed to the inner surface of the cylindrical wall 18 by an adhesive 20 '. The end walls of the wall 18 are closed by end plates 119

Vle, which end plates 119 are adhesively bonded 20 'to the edges of the wall 18. The resilient cushioning fastening members 19 of the sandwich structure consisting of a pair of magnets 15 and intermediate air gap 14 are attached to the inner surface of the end plates 119. The cylindrical wall 18 and the two end plates 119 form a closed box, from which only the pair of wires 28 connected to the coil terminals is removed. The converter module thus formed can be inserted into the cavity 120 of the resonant panel 2 in the direction of the arrow, where it can be secured between the two shells 21 by gluing.

The converter 9 of FIG. 12 is also a low-level electrodynamic converter that can be hidden almost entirely in the thickness of the resonant panel. In this case, the coil 13 of the converter 9 is attached to the inner surface of the cylindrical wall 18 which can be fastened by gluing in the cavity of the core 22. The two ends of the wall 18 are sealed by elastic pliers 59, which are easily deformable grooves 136 in suspension plates 59, near edges, in order to increase mobility. The free surfaces of the sandwich structure consisting of a pair of magnets 15 and intermediate air gap 14 are directly attached to the inner surface of the hanging plates 59. The hanging plates 59 are bonded or clamped along two cylindrical edges of the wall 18. The sandwich structure consisting of a pair of magnets 15 and an intermediate air gap filling element 14 in the inner space of the coil 13 is located in a concentric manner and is axially movable relative to the coil 13 positioned by the two hanging plates 59. - a disc-shaped screen 121 is provided, which is secured by a flexible hanger 17 on the surface of the shell 21. The umbrellas 121 shield the magnetic field of the magnets 15 and the coil 13.

The figure shows a section of two complementary semi-push-pull electrodynamic 9 transducers in the state of the lightweight, high bending rigidity 2 resonant panel 9. The two complementary sides on the two sides of the resonant panel 2, facing each other, have an overall engagement element 93 attached to each other and to the resonant panel 2 through the opening 129 'through the resonant panel 2. Both sides have a fixed coil 13 on the outer surface of a cylindrical wall 18 bonded to the surface of the resonant panel by adhesive 2, and one magnet 15 gripped by the engaging element 93. Both sides of the magnet 15 on each side are each provided with a disc-shaped pole pole 14 'having an air gap between the flanges of a pair of 14' polar arms externally or externally. from inside and around the coil 13. The outer pole holes 14 'have a flange 162 which extends in the arc, so that the air gap can be formed in the plane of the pole poles 14'. The magnets 15 and their pole members 14 'are resiliently interposed with the resonant panel 2 by means of the retaining member 93 by means of a retaining member 17. The fastener 93 comprises two parts, an inner thread portion 160, and an outer thread portion 161, each having a free portion 161, 162, and an end 95 comprising a complementary side of the converter 9. The wall 13 supporting the coil 13 is mounted on a larger diameter circle fixed to the surface of the resonant panel 2, where the mass force of the magnets 15 is transferred to the surface of the resonant panel by means of the elastic hanger 17. The relative displacement of the magnet and coil 9 of the converter 9 in the resonant panel results in a bending wave, which bends radially from the center of the converter 9.

Fig. 11b shows an electrodynamic converter 9 of a resonant panel 9 on one surface of the resonant panel 9, similar to the one of the converter 9a of Fig. 11a. The magnet 15 and pole pole 14 'by the outer flange 162 of the outer pole pole 14' are bonded to the surface of the shell 21, which covers the core 22, by means of a flexible suspension 17.

.1

Figure 1 shows a variant of the configuration shown in Figure 1b, wherein the suspension 17 and the cylindrical wall 18 supporting the coil 13 are not bonded directly on the surface of the resonant panel, but on a base plate 147 so as to be prefabricated, independently. and is an easy-to-install module.

Figure 13 shows a piezoelectric 9 converter mounted on a resonant panel. The main part of the piezoelectric transducer is a piezoelectric sheet 27, which has a swinging mass 25 made of plastics on its free-flange edge and which is fixed to the intermediate element 93 'by the center of the piezoelectric 27. This transmitting member 93 'is fixed in the opening 20 of the resonant panel 2. The intermediate element 93 'is a light, rigid array capable of conveying the dynamic movement of the center of the piezo 27 without deformation or modification. Preferably, the swinging mass 25 is a mineral plastic plastic. The structure thus formed is covered by a housing 26 which protects against external influences, the edge of the housing 26 being fixed on the surface of the resonant panel by an adhesive bond. The piezo 27, in a known manner, emits a bending deformation in a direction perpendicular to its plane, emitting a tension of sound, known in the art, and waking up in it mass forces, which are transmitted to the resonant panel by the transmitting member 93 ', thereby generating bending waves therein.

Fig. 14 shows a piezoelectric transducer 9, which has a disk-shaped piezoelectric plate 27 attached to the edge of the resonant panel 29 by gluing, fixed to the open center of the piezo sheet 27 by means of a resilient damping plate 30; secured. The piezo 27, in a known manner, emitting a sound frequency tension, is subjected to a deformation perpendicular to its plane and wakes up in its mass forces, which it transmits to the resonant panel 2, thereby generating bending waves therein. The magnitude of the generated mass forces at a given frequency depends on the magnitude of the swinging mass 25, resulting in a larger bending torque of greater than 25% in the panel.

The piezoelectric transducer 9 shown in FIG. 15 differs from the embodiment shown in FIG. 14 by using two piezoelectric sheets 27, wherein one of the crystalline piezoceramic sheets 27 is located on one side of the resonant panel 2 at the periphery of the aperture 29, secured by the flange 31. and the second piez 27 is on the other side of the resonant panel 2 at the periphery of the opening 29, fastened by the flange 31, and the swinging mass 25 is connected to the center of each of the two slip sheets 27 by means of a damping plate 30. The two piezo panels 27 are parallel to each other in the same phase with a pair of wire pairs (push-pull mode).

The horse. Fig. 9 is a sectional view of an electrodynamic transducer 9 mounted in a lightweight, high bending rigidity 2 resonant panel 9; The converter 9 on one side of the resonant panel 2 on the aperture 29 passing through the resonant panel 2 is provided with a comprehensive metal or plastic fastener 93 held by the resonant panel 2. The converter 9 has a cylindrical wall 13 fixedly fixed on the surface of the resonant panel 2 by gluing, fixedly fixed coil 13, and a magnet 15 gripped by the engagement element 93. Each pole of the magnet 15 is provided with a disc-shaped pole pole 14 ', which has an air gap between the edges of a pair of pole poles 14' on the outside or on the outside. from inside and around the coil 13. The outer pole holes 14 'have a curved flange 90' so that the air gap can be formed in the plane of the inner pole poles 14 '. The magnets 15 and their pole pieces 14 'are provided with rigid spacers 127 coupled to the resonant panel 2 by means of the fastener 93. The fastener 93 consists of two parts, an inner thread portion 94, and an outer thread portion 96, each portion 94, 96 free and the other end 9 having a head 95 which engages the resonant panel 2 in the center. The wall 18, which holds the coil 13, has a larger diameter circle on the resonant panel surface 2

I is fixed as if the mass force of the magnets 15 is transferred to the surface of the resonant panel by means of the flexible suspension 17. The relative displacement of the magnet and coil 9 of the converter 9 in the resonant panel results in a bending wave, which bends radially from the center of the converter 9.

The converter 9 of FIG. with the exception that there are two complementary push-pull-operated converters 9. The two complementary sides on the two sides of the resonant panel 2, facing each other, on the opening 29 'passing through the resonant panel 2, are fastened to each other and to the resonant panel 2 by a comprehensive engaging element 93. Both sides have a fixed coil 13 on the outer surface of a cylindrical wall 18 bonded to the surface of the resonant panel by adhesive 2, and one magnet 15 gripped by the engaging element 93. Both sides of the magnet 15 on each side are each provided with a disc-shaped pole pole 14 'having an air gap between the flanges of a pair of 14' polar arms externally or externally. from inside and around the coil 13. The outer pole holes 14 'have a curved flange 90' so that the air gap can be formed in the plane of the inner pole poles 14 '. The magnets 15 and their pole members 14 'are provided with a rigid support 19' interposed with the resonant panel 2 by means of the fastener 93. The plastic or metal fastener 93 comprises two parts, an inner thread portion 94, and an outer thread portion 96, each having parts 94, 96 free, the other end having a head 95 which connects the complementary sides of the converter 9. The wall 13 supporting the coil 13 is mounted on a larger diameter circle fixed to the surface of the resonant panel 2, where the mass force of the magnets 15 is transferred to the surface of the resonant panel by means of the elastic hanger 17. The relative displacement of the magnet and coil 9 of the converter 9 in the resonant panel results in a bending wave, which bends radially from the center of the converter 9.

Fig. 18 shows a speaker 81 similar to that shown in Figs. 1 and 2, with a rectangular frame opening 82 in the intermediate area of the resonant panel 81 of the speaker 81, having a resonant panel 4 with a flexible suspension element 82 in the garden aperture 82; suspended by vibration and driven by a separate converter 9. The structure of the smaller resonant panel 4 is similar to that of the larger resonant panel 2, i.e. it is a composite sandwich structure made of cores and cores covering both sides of the core. The 9 converters are only and exclusively for your 2 or. They are connected to 4 panels acoustically. The larger 2 resonant panel radiates in the lower frequency range of the sound range, while the smaller 4 resonant panel radiates in the upper frequency range of the sound range. With this design, the entire frequency range can be construed.

Figure 19 shows two resonant panels driven by two converters 9 to illustrate how this can be accomplished. At the two suitable locations of the resonant panel area 2, a smaller, high-pitched piezoelectric transducer 70 (such as the converter shown in Figure 24) and a larger electrodynamic converter 71 are provided. Both converters 70, 71 are driven from the same amplifier 10. The electrodynamic transducer 71 is directly connected to the output of the amplifier 10, the piezoelectric transducer 70 requiring a higher drive voltage is coupled to the output of amplifier 10 via a voltage increasing transformer 72 and a serial adapter 73.

Figure 20 also shows two resonant panels with two converters 9, two piezoelectric transducers 70, 74. One of the high-pitched transducers 70 is the converter of FIG. 24, and the other deep bass piezoelectric transducer 74 may be any of the transducers shown in FIGS. Along the perimeter of the subwoofer 74, a significant swinging mass 75 is attached to the center of the piezo sheet fixed on the board of the resonant panel 2. Both transducers 70 are driven by the same high signal voltage amplifier 10, each converter 70, 74 having a resistor 78 connected in series. The resistors 78 are parts of a frequency inverter.

Fig. 21 is a schematic diagram showing the drive of two resonant panels driven by two converters 9, a high-frequency electrodynamic converter 68 and a bass electrodynamic 69 converter. The high-pitched converter 68 has a relatively high inductance, the low-frequency converter 69 is a smaller inductor device, coupled to the same amplifier output 10 of both drives 68, 69. The deeper voice converter 69 receives, without limitation, a full frequency band drive, with a low-pitched smaller converter 68 coupled to a frequency filter 77 condenser that separates the low frequency components of the drive frequency signal.

Figure 22 shows an acoustic device and connections that can be used in an interactive environment as a speaker and a sound sensor. The resonant panel 2 of the acoustic device has a sandwich structure similar to that described in Figures 1 and 2. The acoustic device is held by the suspension wires 33 suspended. Not shown in the figure, but the suspension of the resonant panel 2 is of the structure shown in Figure 1, i.e. the resonant panel 2 is held in frame 1 by the suspension element 3, the hanging wires 33 fixed on the ceiling hold the acoustic device by its frame.

The transducer 9, 63 arranged at the respective locations of the resonant panel 2 is coupled to the output of a amplifier 10 and actuates the acoustic device as a speaker, two vibration detectors 63 fixed at different locations in the resonant panel are connected in parallel to a strong input of a signal generator 65 , which signaling amplifier 65 has output 66. A further vibration sensor 63 is coupled to an input of a further signal-forming amplifier 64, the amplifier output 64 of which is coupled to a further input of said correlation signaling amplifier 65, where it is used for signal correction. The output of signal signal amplifier 65 is preferably connected to a filter / correlator stage input. This arrangement can also be used as a speaker, as a microphone, for example in an interactive connection.

Fig. 23 shows an acoustic device formed as a microphone and connected accordingly. The device is designed to detect and record sounds producing waves in the resonant panel of FIG. The microphone should be designed with the lightest possible resonant panel 2, with a transducer sufficient for sensing, but with multiple converters, the coupling between the transducers and the surface of the resonant panel 2 is improved, greater sensitivity and smoother, wider frequency characteristics can be achieved. In this example, four vibration sensors, piezoelectric transducers 63 are located at the respective locations of the resonant panel area 2, and the outputs of the transducers 63 are coupled to a common signal-forming amplifier 65 that can receive the frequency-frequency electrical signal from the output of signal-forming amplifier 65. Suitable locations are those parts of the surface where the nodes of as many vibration modes as possible are close together. The corresponding locations are in diagonal directions on the panel, at the distance between the centerlines and the 3/7, 4/9, 5/13 already mentioned in Figure 3a. These suitable locations are quite close to each other, but it is very important to position the converter in terms of performance.

When designing a higher quality microphone, consider the non-reciprocal nature of the sound / bending wave transformation. There are two factors involved: there is a need for some selective frequency response to make the microphone characteristic as wide as possible and complex resonance of the resonant panel complexes.

This requires sensing with at least three piezoelectric transducers 63, which can be connected in parallel in three simple sensors. In an alternative embodiment, a larger area polymeric piezoelectric film is used, which can be used to select microphones having different characteristics by selecting a geometric shape that covers film vibration nodes.

The resonant panel microphone is the more sensitive the smaller the specific mass of the resonant panel 2, so the panel should be dimensioned as lightly as possible, but with a sufficiently high bending stiffness. This way you can get the best fit (coupling) between the sounds and the bending waves. Our calculations have shown that if a converter is used, it would be advisable to install it in a corner of the corner, because it is true that the efficiency will be relatively small, but practically every vibration will generate waves here.

The resonant panel 2 of the acoustic device of Figure 23 has a sandwich structure similar to that illustrated in FIGS. The acoustic device is held by the suspension wires 33 suspended. Not shown in the figure, but the suspension of the resonant panel 2 is of the structure shown in Figure 1, i.e. the resonant panel 2 is held in frame 1 by the suspension element 3, the hanging wires 33 fixed on the ceiling hold the acoustic device by its frame.

Fig. 24 is a piezoelectric converter illustrated in a mounted state. The piezoelectric transducer plate 27 of the piezoelectric converter is not bonded directly to the flange 21 of the resonant panel 2, but to a flange 118 of brass or other material, and this base plate 118 is bonded by 20 'bonding to the resonant panel 2. The pair of pairs 28 is known to be attached to the piezo 27. Through the pair of wires 28, the acoustic voltage voltage is applied to the piezo 27 and bends the piezo sheet 27, which deforms the resonant panel 2 locally and flexibly.

Figures 25a and 25b illustrate a suspended ceiling and structure comprising a speaker 81. The suspended ceiling consists of a raster 99 frame suspended or otherwise fixed to the ceiling and ceiling elements 36 located in the openings of the frame 99, which ceiling elements rest on a horizontal stem of the inverted T-profile of the frame 99. The speaker 81 is configured as one or more such ceiling elements 36. The loudly resilient panel 2 of the loudspeaker having a high bending rigidity, 81, rests on a ribbon-like, elastic suspension member 3 which is arranged along its circumference and on the other hand lies on the horizontal stem of the inverted T-profile of the frame 99. The hanging member 3 may be attached to the resonant panel 2 or frame 99, but may also be positioned without attachment when the connection is entrusted to gravity.

The resonant panel 2 is a sandwich-shaped sheet with light and rigid core, which is covered with a high-strength shell on both sides. In a preferred, good sound quality design, the core of the resonant panel 2 is an expanded polystyrene foam sheet having a thickness of 100 mm, covered with a 0.1 mm thick aluminum alloy film on both sides. The 3 mm thick foam strip 3 is bonded to the edge of the resonant panel 2 to simplify the assembly of the suspended ceiling. The advantage of using the suspension member 3 is also to prevent the vibration from spreading to the frame 99 and through it to the ceiling.

At the appropriate location of the resonant panel 2, an electrodynamic transducer is attached, which generates bending waves corresponding to the drive, sound frequency, and electrical signals in the resonant panel 2. The converter 9 is preferably e.g. having a 25mm or 38mm diameter, 6 ohm impedance movable coil attached directly to the surface of the resonant panel 2 and capable of converting 40W power. The transducer 9 is coupled to the resonant panel 2 by means of a flexible transmitting element.

Relatively low cost can be used to produce 2 resonant panels whose plastic foam core is covered with a paperboard shell. The shell may contain an additional layer of metal foil for fire protection reasons. The 9 converter used can also be a relatively inexpensive piezoelectric converter which, although not capable of performing as much as an electrodynamic transducer, performs more than sufficient background music for lower demand speakers.

If a metallic material or carbon fiber is used in the core or shell of the resonant panel 2, a grounding conductor can be connected to it and thus also act as an electromagnetic shield.

The loudspeaker 81, which is formed as a ceiling element 36, is relatively simple in structure, because there is no need for separate frames, boundary walls, and the resonance of the resonant panel 2 is simple. The acoustic panel is also light in relation to the other 36 ceiling elements, not overloading the ceiling 99. The loudspeaker 81 can be inserted into the frame in the same manner as the other ceiling elements, can be decorated, painted, wallpapered, etc. in the same way. this way, it can be made indistinguishable from the other ceiling elements. Other advantages include: against a ceiling element carrying a conventional loudspeaker, that minor injuries and errors do not interfere with its operation. In the sound reproduction, the advantages of the aforementioned wide directional characteristics in the spatial distribution of sound and good speech comprehension are also prevalent here. In our experience, high-quality sound reproduction can be achieved with half the speakers when using ceiling elements with a conventional speaker.

Fig. 27 is a perspective view of a monitor 137 with a cathode ray tube or liquid crystal screen 37, the side walls 102 of the housing 101 of the monitor 137 being formed as a loudspeaker 81;

The housing 101, made of plastic, by injection molding, rectangular side walls 102, is thinner than the resonant panel 2 at other locations on the housing 101 and has a groove 100 at the boundaries of the thinner area defining the boundaries of the resonant panel 2. The surface of the thin-walled part on the inner side has a light-weight core 22 and is bonded to the inner shell 21, thereby stiffening the thin-walled portion (Figure 28). The resilient member 3 of the resonant panel thus formed is formed by the groove 100, the frame of which is an outside portion of the housing. A resonant converter 9 is provided at the appropriate location on the resonant surface.

Figure 29 shows a laptop computer 128 in an open state. The laptop computer 128, as is known in the prior art, has a keyboard 130 with a liquid crystal display 129, which has a resonant panel 39, 40 connected to the lid 130 in a novel manner. Alternatively, the rectangular loudspeakers may be inserted into the corresponding opening 82 'of the lid (loudspeaker 39) in the direction of the arrow, or alternatively, hinged with hinges 34 and folded to the display 129 (loudspeaker 40) in the direction of arrow B.

Both loudspeakers 39, 40 have a lightweight, resonant panel and converter 9, as illustrated in Figure 1, having a resonant panel (Fig. 30) of a composite sandwich panel of high strength material shells with a lightweight structure and two sides thereof. The resonant panel 2 is interposed by means of a flexible suspension member 3 in a plastic frame 1 (Figure 30). A converter 9 is provided at the appropriate location of the resonant panel. The resonant panel 2 and the converter 9 are preferably covered with a cover grid which is not shown in Figure 29.

31-33, a portable CD player 41 with speakers 81 is shown. The CD player 41 has a body 85 provided with a disc gate 82 and a control button 137 for receiving a CD, which, on both sides of the body 85, when the CD player 41 is closed (FIG. 31), is closed with a speaker 40 which is essentially a speaker 1. 1 and 6, respectively. The loudspeakers 40 are hinged to the body 85 of the CD player 41 and can be brought into the open state as shown in FIG. In this open state, the body 85 serves as a stereo-enhancing sound field.

The resonant panel 2 of the loudspeakers 40 (Figure 33) is a sheet of ultra-lightweight and high bending rigidity covering the two sides of a cellular core, which is lightweight in a plastic frame 1, e.g. resting on a foam rubber 3 hanging member. At the appropriate location of the resonant panel area 2, a piezoelectric transducer 9 is provided in the panel, which provides bending waves, as shown in FIG.

Figures 34 and 35 show a differently designed CD player 41 with other speakers 39, 40. On the top of the body 85 of the CD player 41, there are disc discs 86 and control buttons 137 arranged to fold the cover 139 of the CD player 41 in the direction of the arrow D in the disc disc 86. The loudspeakers 39, 40 are substantially configured in accordance with the speaker 81 of FIG. 1, and rectangular loudspeakers may alternatively be inserted in the direction of the respective opening of the lid (loudspeaker 39) in the direction of the arrow F, or alternatively the hinge 139 is connected to the lid 139 and the arrow E is attached. they can be folded in the direction of the inside of the lid (40 speakers).

Both loudspeakers 39, 40 have a lightweight, resonant panel and converter 9, as illustrated in Figure 1, having a resonant panel (Fig. 35) of a composite sandwich panel of high strength material shells with a lightweight structure and two sides thereof. The resonant panel 2 is interposed by means of a flexible suspension member 3 in a plastic frame 1 (Figure 35). A converter 9 is provided at the appropriate location of the resonant panel. The resonant panel 2 and the converter 9 are preferably covered with a cover grid which is not shown in the figure.

The resonant panel 2 of the loudspeakers 39, 40 (Figure 35) is a sheet of ultra-lightweight and high bending rigidity covering the two sides of the cellular core, which is lightweight in a plastic frame 1, e.g. resting on a foam rubber 3 hanging member. At the appropriate location of the resonant panel area 2, a piezoelectric transducer 9 is provided in the panel, which provides bending waves, as shown in FIG.

Figures 36 and 37 show the arrangement of the cabinet 102 'of the vehicle 102 and the loudspeakers 81 of the seats 203 in the cabins 103. Cabin 102 'may be a passenger airliner, ship, train or bus cabin in which the seats are arranged behind each other. The backrests of passenger seats are often formed by molding, plastic, and mussels. As shown in FIG. 37, the resonant panel 81 of the present invention can be integrated into such backrests. To this end, a rectangular area is formed around the other portions of the back portion of the backrest 203, which is surrounded by a groove 100 forming an elastic suspension member. The surface of the thin-walled part on the inner side has a light-weight core 22 and is bonded to the inner shell 21, thereby stiffening the thin-walled portion (Figure 37). The resilient member 3 of the resonant panel thus formed is formed by the groove 100, the frame of which is part of the seat back portion 203. A resonant converter 9 is provided at the appropriate location on the resonant surface.

Fig. 38 is an inner side view of a vehicle 140 with a conventional piston-driven cone 42 with a loudspeaker. The loudspeaker 42 is secured in the liner 104 of the pressed plastic door 140, behind the cutout of the plastic wall of the pocket 141, and is covered with a decorative grid. The sound directed from the loudspeaker 42 reaches the height of the driver or passenger at the foot, which is extremely acoustic.

Fig. 39 shows a door 140 similar to the one above, in which the door 104 is fitted with a resonant panel 81 of the present invention.

The loudspeaker 81 is molded into a molded plastic wall 141 of a pocket 141 of a molded plastic. In the wall of the pocket 141, a rectangular area is formed around the other portions, surrounded by a groove 100 which forms a flexible hanging member 3 for the speaker 81. The surface of the thin-walled part on the inner side has a light-weight core 22, and the inner shell 21 is glued to make the thin-walled part stiffened (Figure 40). The resilient member 3 of the resonant panel thus formed is formed by the groove 100, the frame of which is an additional thicker wall portion of the lining 104. At the appropriate location of the resonant panel area 2, a piezoelectric transducer 9 is provided in the panel, which provides bending waves, as shown in FIG.

Figures 41 and 42 show a schematic representation of a car 106, which has two loudspeakers 81 integrated in the rear hood 105 of the vehicle. The shelf holder 105 is divided into two portions with a rigid flange 43, and the design of the speakers 81 is in addition to that of FIGS. 39 and 40.

In the wall of the shelf 105, a rectangular area, which is thinner than the other portions, is formed around the groove 100, forming a hanging element 3 for the speaker 81. The surface of the thin-walled part on the inner side has a light-weight core 22 and is bonded to the inner shell 21, thereby stiffening the thin-walled portion (Figure 42). The resonant 3 resilient pa84 of the resonant 2 thus formed is formed by the groove 100, the frame of which is an outer thicker wall portion of the shelf 105. At the appropriate location of the resonant panel area in the panel, there is an electrodynamic 9 converter producing bending waves, mounted entirely and entirely on the resonant panel 2.

Figures 43 to 46 illustrate exemplary loudspeaker arrangements of keyboard instruments with 81 speakers. For example, the instrument 137 " 137 " as shown in FIG. 43, is an electronic piano, a 138-inch instrumental body, and a 140 'keyboard. Traditionally, the instrument panel 138 incorporates a keypad-controlled sound generator, amplifier, and speaker. According to this example, the lower panel of the instrument body 138 is formed as a loudspeaker. The configuration of the distributed mode resonant speaker 81 is illustrated in FIG. The resonant panel 2 of the rectangular speaker 81 having a lightweight and high bending stiffness is held in a frame 1, allowing for movement, with the provision of a flexible suspension member 3. The grip design is illustrated in Figure 46. A converter 9 is provided at the appropriate location of the resonant panel.

FIG. 45 is a view similar to FIG ARC musical instrument is depicted. There is a difference between the two instruments in the arrangement of the speaker 81. In this example, the loudspeaker 81 is arranged in the plane of the rear legs 141 ', in a vertical plane, and its frame is formed by a larger, medium-density fibreboard or fuselage plate wall 6. The structure of the resonant panel 2 driven by the bending waveform converter 9 is similar to that described in the example above. The loudspeaker 81 may be configured as shown in FIG ARC as part of the instrument stand.

Fig. 47 shows a dispenser of 108 beverage vending machines with a sound wall 81 built into the front panel 109 '. The speaker 81 provides loud information about the handling and stock of the machine. In addition, the front panel 109 'is provided, as is known in the art, for accepting coins 14,

137 v selection buttons for selecting the item and 142 publishing windows for the selected, dispensed item.

The speaker 81 is substantially shaped as shown in Figure 1 (Figure 48): the resonant panel 2 has a light, cellular core 22, which covers both planes of the core with a high elongation 21 shell. The resonant panel 2 is resiliently connected to the portion 1 of the front panel 1 of the beverage vending machine 108 'with a foam rubber ribbon-shaped suspension member 3. The exterior surface of the resonant panel 2 can be utilized for visual information, e.g. instructions for use in graphic or text format. At the appropriate location of the resonant panel of the resonant panel A'2, a converter 9 is formed in the panel for bending waves, which is connected to a power amplifier of a message generating voice generator arranged inside the beverage machine 108.

The vending machine can also be formed with a bi-directional acoustic device for transmitting the resonant panel 2, in addition to the converter 9, which causes the waves of bending waves in the panel, an external acoustically oscillating vibration sensor 9 of the resonant panel 2 is also installed. Such a bi-directional communication panel and connections are shown in Figure 49.

The resonant panel 2 of FIG. 49, which is mounted on a resonant panel, is connected to the output of amplifier 10 (FIG. 24). Further, at the various suitable locations of the panel, two transducer vibration sensors (Fig. 24), externally acoustically excited by the resonant panel 2, are mounted, which are connected to the input of a signal transformer amplifier 65 having a (microphone function) 63 transducer output. Mounted on the resonant panel 2, there is also a third converter 63 of resonant panel 2 vibration detector (FIG. 6) for correction purposes and connected to a filter / correlator 64 signal-forming amplifier, which is a signal-forming amplifier 64 of a signal-forming amplifier. is connected to another input. Through the microphone transducers 63, a dispensing machine can accept verbal instructions.

Figures 50 to 52 show a loudspeaker speaker 81 formed as a demonstration board. The configuration of the speaker 81 is substantially as described with reference to Figure 1, with a demonstration surface (laminating, painting, etc.) similar to conventional demonstration boards. The board structure is designed to maintain bending waves up to the edges generated by the electrodynamic converter 9 according to the aspects already described. Virtually the entire surface of the board is a broadband, speaker, distributed mode, resonant 81 speaker, flat speaker. For a group of less than 10 students, 0.56 m 2 Area 48, with a board of 0.7 to 1.2 m for 30-50 students can provide the right sound performance. These dimensions provide excellent speech intelligibility and background music or sound effects. The sound emitted from the relatively large surface is also advantageous with regard to the disturbing effect of the room echoes, the direction and phase of the echoes are scattered, so their interference is minimal. Physical damage to the tablet does not affect the sound reproduction significantly.

For good speech intelligibility, less electrical and acoustic signal power is sufficient. This allows you to make speakers for voice playback at low cost. The core of a resonant panel of such a loudspeaker is a paper-based honeycomb or foam 3-6 mm thick sheet, which is covered with a shell of 0.08 to 0.3 mm thick on both sides of the core, covered with plastic, and a sheet of paper. A relatively inexpensive resonant panel is preferably equipped with a piezoelectric converter. Such a resonant panel has an increasing acoustic power as the frequency increases, which can be made flat, linear by appropriate frequency compensation of the drive voltage (by inserting a resistor and selecting a suitable swinging mass). The frequency path also influences the loss factor of the shells, the selection of the viscoelastic property of the shell fixative binder and the proper selection of the piezole. The properties of the shell are also influenced by the glued poster or other information sheet, which is useful for calculating the resonant panel.

For higher power requirements, a larger resonant panel is preferably constructed using a thin sheet metal alloy material. Metal or semi-metal shells have a lower loss factor and better bending wave propagation, better acoustic performance, with a higher power (electrodynamic) converter. The frequency range of such resonant panels is flat over a wide frequency range. In the case of a resonant panel that requires a smooth, flat and relatively large surface on both sides, the converter can be fully integrated into the panel structure. If there is a need for magnetic shielding, it is advisable to place a soft-foil covering the electrodynamic converter under the shell. This can also result in some efficiency gains by rearranging the fluxes.

Small, low-cost, resonant panels do not require a frame or damping with specific parameters, usually a dampening for them when set on a table as a photo holder. There are hard foam plastics, eg. non-plasticized PVC, which does not require a separate shell layer for acoustic, resonant panel operation.

The entire surface of the boards 48 (Fig. 50) or the hanging wire (Fig. 51) mounted on the rack 23 (Fig. 50) shown in Figs. The surface of the table 48 serves to position the printed information material, the sound broadcast by the speaker 81 commenting, coloring, completing, according to the program.

As shown in Figure 52, the frame 1 has a lip-like protrusion 4 'which is fixed at the back of the spring portion 4' by the resonant panel support 2, resiliently mounted. The piezoelectric transducer 9 of FIG. 24 may also be used to drive the 2 resonant frames of the board.

Fig. 53 shows a void packing box 111 in the open position. The packaging box is only one example of the use of an acoustic device according to the invention on packaging. The box 111 has a foldable lid 139, which is a box 111, or at least a portion thereof, of a composite 2 resonant panel. The resonant panel 2 is a lightweight and rigid sandwich structure consisting of a foamed plastic core and wrapping paper. In the example, the back wall 040 of the box 1111 is formed as a loudspeaker 81. At the appropriate location of the rear wall 140, which serves as the resonant panel of speaker 81 (FIG. 24), a piezoelectric transducer 9 is fixed according to one of the methods already described. In Fig. 53, a dashed line 9 is also selected which is used to form the front side wall of the box as a loudspeaker.

The piezoelectric transducer 9 (shown in FIG. 24) is fixed on the inside of the backsheet 140 and is also coupled to an elemental audio generator 112 fixed on the back wall 140. The on / off switch of the audio generator 112 is a switch 53 integrated in the hinge 139 connecting the cover 139 to the rear wall 140, which activates the sound generator 112 when the lid 139 is opened. The boundaries of the resonant panel 2 are at the junction of the side panels which serve as a frame for the resonant panel 2. No separate frame or hanging elements are needed. The shape of the package may not necessarily be the square box shown above, the shape of the package may be adapted to the contents of the package. For example, a CD package may include a audio presentation of the CD or other information about the CD.

Fig. 54 shows a loud greeting card 144. The cover plate 145 and backsheet 146 of the folded greeting card 144 can be opened, and a switch 53 is formed at the opening, which activates a sound generator 112 when opened. At least the back side 146 of the greeting card 144 is formed as a loudspeaker 81 having a resonant panel 2 of the speaker 81 formed with a plastic foam core and strong paper shells. This type of panel material is also available and is commercially available as KAPPABOARD. The European standard lap 'sheet is suitable for loud greeting card 144. At the appropriate location on the inner side of the backsheet 146 that forms the resonant panel 2, the piezoelectric transducer 9 is shown in FIG. The battery powered 112 generator which drives the converter 9 is also fixed on the backsheet 146. The switch 53 switches on the supply voltage of the audio generator 112 when the greeting card 144 is opened. There is no need for a frame or a separate flexible suspension for the functionality of the resonant panel 2. The resonant panel 2 is provided with satisfactory damping and hanging either by the material of the 144 greeting card itself or by holding the greeting card or placing it on a table top.

Figure 55 illustrates a multimedia audiovisual system comprising a projection screen 31 'and a projection table 32 having a projection screen surface. The projection board 32 of FIG. 1 is a sandwich structure made of aluminum foil having a honeycomb core 22 and covering it with aluminum or carbon fiber reinforced shells 21 (FIG. 56), wherein the core 22 and the shells 21 are secured with an epoxy resin. The size of the resonant panel is 1.22 x 1.38 m, and the thickness of the aluminum shells is 300 microns. The core 22 has a thickness of 11 mm, and the size of the honeycomb cells is about 9.5 mm. Such a panel has a rigid and low density, high modulus and substantially isotropic bending stiffness. The loudspeakers (loudspeakers) 114 of the left and right channels are mounted on both sides of the screen 32 forming the center speaker and secured with hinges 34 on one side edge of the projection table 32. The loudspeakers 114 may be folded to the surface of the projection board 32 when inoperative. The two-sided speakers 114 are sandwiched with 2 resonant panels of aluminum foil or carbon or carbon. with glass fiber reinforced plastic shells. The shells are suitably coated with a decorative material such as melanex. The core of the resonant panel of all loudspeakers is an aluminum foil or paper honeycomb structure. By impregnating the paper-based honeycomb structure with a thermoplastic plastic such as phenol, the core stiffness can be increased. The core cells are 3-6 mm in size, with a core thickness of 3-10 mm, and an aluminum foil thickness of 25-100 microns. An epoxy adhesive can be used to bond the shells and the core. The transducers 9 connected exclusively to the resonant panel 2 are embedded in the core of the resonant panels 2, not visible from the projection screen side.

The resonant panel speakers provide better stereo effect than conventional conical speakers. From the stereo sound, the relative location of the original sound sources in the recording can be determined, but the sound of the tiny, conical speakers is too controlled, phantom places appear, resulting in a distorted, less effective sound compared to the actual layout. According to experts, the location of the sound speakers should not be detectable in the listening sound. This is further aggravated by sound waves reflecting from the walls of the listening room, which also incorporate frequency-dependent changes into the sound. In the arrangement shown in Figure 55, the two side speakers 114 are broadband speakers of at least 100 Hz to 20 kHz. The projection board 32 is suspended on the hanging wires 33 as shown, but can also be arranged on a rack.

In the projection 145 'of FIG. 57, seats 146' are provided for viewers. The left and right speakers 114, 115 on both sides of the projection board 32 are arranged in a conventional conical 35 subwoofer two alongside the wall, and two backlights 117 are located on the rear wall. Preferably, the background speakers 117 are broad-band flat speakers of the type shown in Figure 1, which may be speakers similar to the left and right speakers 114,115. Especially in a room that accommodates a large group of viewers, it is important that the sound sources are not small. With the use of small, conventional speakers, many phenomena worsen the image: this is the difference in intensity, which results in a different tone between people in different places, and that is where the speaker positions appear in the sound. These phenomena can be so intense as to distract the listener from the sound of the main audio channels, the listener hears a highly localized sound, and the stereo effect does not prevail. These phenomena cannot be detected when using resonant panels according to the invention. The large group of students can sit up to half a meter from one or another source of sound without locating it while listening to music. Using the speakers according to the invention, we can gain a more natural space feel than using the same number and arrangement of conical speakers.

Fig. 56 is a detail of the tangling of the speaker 114. The frame 1 has a lip-like protrusion 36 'which is fastened on the back of the protruding frame member by a resilient panel support 2 resonant.

Fig. 58 shows a loudspeaker 81 having a panel larger than the size required for sound reproduction, the active surface portion of which is defined by incisions 38 preventing the propagation of the bending waves. Such 38 incisions can effectively correct irregularities in the distribution of the bending waves, preventing the occurrence of unwanted frequency resonances.

Further corrections eg can be performed in the context of coincidence friction, by forming the electronic frequency sequence of the drive signal.

Figs. 59a show examples of various corrections of the drive signal. Figure 59c shows the desired voltage / frequency (V, f) 96 'transmission curve. To achieve this, the piezoelectric transducer is connected directly to the output of the amplifier 10 via a capacitor 77 connected in series. A similar effect can be achieved in the coupling of Fig. 59b, where the piezoelectric transducer 9 is directly connected to the output of the amplifier 10, but the input signal of the amplifier 10 is modified by a high-pass filter consisting of a serial capacitor 77 and parallel resistor 78. Fig. 59d shows the wrenching signal of the piezoelectric converter 79.

At a specific frequency, attenuator or attenuator. Figures 60a-d illustrate the connections resulting in a certain degree of correction. Fig. 60a shows a resonant ballast consisting of an inductance, a capacitor 77 and a resistor 78 mounted in parallel between the amplifier output and the electrodynamic transducer 9, wherein the resistor 78 of the converter 9 is dimensioned for insertion into the bracket. The circuitry shown in Figure 60a at a specified frequency (and its surroundings) results in a frequency damping. The transmission curve 132 reflecting this is shown in Figure 60b.

Fig. 60c shows a damping member 78 of resistor 78 and resistor 78 in series, similar to that shown in Fig. 60a, with a resistor 78 and a parallel resistor 78 coupled to the transducer curve 60d. is illustrated in FIG.

The shape of the loudspeaker 55 with a resonant panel with forward convex surface converter 9b in FIG. Curved resonant membranes were already associated with bending stiffness. However, it may be necessary to have a curved (focused) acoustic device for acoustic or architectural reasons (fitting to a column or curved wall surface). These may include microphones, passive reflective or filter surfaces, or possibly active speakers. Radiation (or sensitivity) of the convex, cylindrical surface as shown in the figure is divergent, while the concave, cylindrical surface (or sensitivity) of Figure 61b is focused.

Fig. 61c illustrates an example of the use of convex and concave acoustic devices. In a lecture hall, it is advisable to place a concave loudspeaker 55, where diffuse radiation 57 emitted from the back of the speaker and reflected from the wall is applied, and it is advisable to place a convex loudspeaker 55 at the rear, where the diffuse sound radiation produces a pleasant, harmonious background sound.

Figure 62 illustrates a home theater projection room, which is partly equipped with conical loudspeakers from previous purchases. The projector 145 'is provided with a resonant panel 116 in front of the projector, in the center, opposite the projector 31, corresponding to the center channel of the speaker system. Front, double-sided, 42 'speakers with conventional speakers have the right and left attachment. In addition, two subwoofers 35 with conventional speakers are provided on both sides. The 117 rear speakers are resonant panel speakers.

Fig. 63 illustrates an example of sounding a small theater or dance studio, where the speaker 2 resonant panels are suspended on the walls like images.

Fig. 64 is a resonant panel 44 formed as a shelf having a 45-foot, 48 'Hi-Fi device, as a possible combined fusion solution.

Figure 65 shows the walls of a conventional box with a conical loudspeaker, speaker, 44 resonant panels. With this solution, you can reduce the box tone of a conventional speaker, and correct the flaws in the tone of the traditional speaker.

Fig. 66a shows a resonant panel 47 formed as a resonant box of a piano, resonant panel 47 connected to the frame of piano 106 'as shown in Fig. 66b. The resonant panel 47 is interconnected by the fixing of the fixing screws 107, the spacer through the core 22 and the shells 21 of the frame 106 '. The fastening screws 107 may have clamping or retaining functions, but are preferably punctured at locations in the resonant panel 47 that do not degrade resonant conditions of the panel or are suitable for positioning the resonant panel area converter. However, the selection of the location of the fixing screws in the resonant panel is motivated by the fact that no undesirable resonances occur in the resonant panel.

Figures 67a and 67b illustrate intermediate stages of manufacturing the resonant panel starting from the phase where the large resin 22 large sized sheets are formed on one side with a shell 21 (Figure 67a). First, the transducers 9 in the core 22 are first installed in places corresponding to the resonant panels to be formed, in so far as the resonant panels are to be descrambled from the core sheet, a printed wiring 122 is formed, which will form the terminals of the panel and copper 28 for printed wiring. connecting the transducers 9 with a pair of wires (upper part of Fig. 67b). The second shell 21 is then adhered to the free side of the core plate (the middle portion of Fig. 67b and the plate is forwarded in the direction of arrow 125, and the resonant panels 2 are cut below the cutting device. At the expected location of the longitudinal cut, 123 strips of insulation are left. The above-described method for producing mainly rectangular resonant panels is only one example of methods for producing an acoustic device.

The acoustic devices according to the invention can be used in at least as wide, but wider application areas as conventional speakers and speakers.

· «» «

Claims (4)

    PATIENT INDIVIDUAL POINTS
  1. A method for forming an acoustic device comprising a resonant panel (2) of an acoustically active area for maintaining at least a portion of a bulky surface of the device in a thickness-perpendicular manner, which is resonantly provided by the parameters of the resonant panel geometric and / or bending stiffness. (2) resonances produced by natural bending waves and their distribution, characterized by analyzing the spatial distribution of the natural resonances of the bending waves and the parameter-dependent variations of the distribution in the active area of the resonant panel (2), followed by selection, from the distribution of the natural resonances of the bending waves; the parameters corresponding to the acoustic application target and the frequency range are selected and the device is constructed with a resonant panel (2) having the selected parameters.
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    Method according to claim 1, characterized in that two parameters of the area of the resonant panel (2) are selected as parameters.
  3. Method according to claim 1 or 2, characterized in that during the analysis, the vibration energy from a resonant node is evaluated in part or by region and the proportion of the parts with relatively low vibration energy is reduced by selecting the parameters.
    Method according to claim 3, characterized in that by selecting the parameters, the parts with relatively low vibration energy are minimized.
    Method according to any one of claims 1 to 4, characterized in that the vibration energy from one resonant node is evaluated in part or by region in the analysis, and by selecting the parameters, in the active area, the natural spatial resonance of the resonances of the bending waves regional distribution.
    6. A method for forming an acoustic device, comprising a resonant panel (2) of an acoustically active area for maintaining at least a portion of the bulky surface of the device, and resonance modes of the natural bending waves along at least two parameters of the resonant panel. characterized by its characteristic distribution, more active and active, and less active and least active surface parts, characterized by analyzing the values of the natural resonances of the bending waves, characterized by more active and active, and less active and least active surface portions, and by selecting for acoustic application. optimally, select the parameters that reduce the less and least active parts to the higher-activity portions, and order the device with the selected parameters with a resonant panel (2).
    Method according to any one of claims 2 to 6, characterized in that the resonant modes and the factors affecting their distribution have a first group dependent on the first parameter, and a second group of factors influencing the resonant modes and their distribution depending on another parameter is the values of the first and second group selected by parameter selection for relatively active and even more active areas at the expense of less active and least active areas, in interaction and feasibility.
    Method according to any one of claims 1 to 7, characterized in that the frequencies of the resonant modes and their distance measured from each other are determined during the analysis, and the allocation of frequencies is changed in the direction of the optimum that can be achieved by the selection.
    Method according to any one of claims 1 to 8, characterized in that the parameters are associated with at least two principally suitable frequencies, which are associated with resonant modes.
    10. A method of forming an acoustic device comprising an acoustically active resonant panel (2) of at least a portion of a surface extending in a direction perpendicular to the thickness of the device for maintaining bending waves, and for resonance modes of the natural bending waves at least two parameters of the resonant panel (2). at least two. in principle, a suitable frequency may be assigned, characterized in that the resonant modes, which differ in at least two frequencies, which are suitable for achieving the acoustic properties appropriate to the purpose of use, are suitable for determination of at least two frequencies, which are in principle suitable frequency frequencies at the appropriate stages distributed; they belong to suitable resonance modes and the device is constructed with a resonant panel (2) having the selected parameters.
    Method according to claim 8, 9 or 10, characterized in that by selecting the parameters, we assure the relation of the theoretically suitable frequencies to the characteristic frequencies of the natural resonance modes, in which the different frequencies are arranged unequally between each other, stepwise distributed. .
    Method according to any one of claims 8 to 11, characterized in that the principally suitable frequencies are set by selecting the values of the different parameters.
    Method according to any one of claims 1 to 12, characterized in that the selected parameters are related to the geometric design of the resonant panel (2) and / or the bending stiffness of the different directions.
    Method according to any one of claims 1 to 13, characterized in that the selected parameters are parameters of the same type, in proportion or in proportion to the theoretically suitable frequencies.
    Method according to claim 13 or 14, characterized in that the selected parameters determine geometrically at least the shape of the sub-area in which the resonant panel (2) has a given bending stiffness.
    16. The method of claim 15, wherein the selected geometric parameters define a particular variation of the base shape according to different dimensions of the shape.
    17. A method of forming an acoustic device comprising determining a geometric configuration of an acoustically active area extending in a direction perpendicular to the thickness of a resonant panel (2), to analyze the spatial distribution of resonances of the natural bending waves with a resonant having different geometric parameter values. panels (2), the distribution of which will be different for different spatial configurations and relative parameter values for which the natural resonant modes correspond at least approximately to the desired mode of operation and frequency range, and construct the resonant panel of the acoustic device with the selected relative geometric parameter values (2).
    18. The method of claim 17, wherein the selected geometric parameters are associated with different dimensions of the area.
    19. A method for forming an acoustic device having an acoustically active resonant panel (2) having a bulky surface in a direction perpendicular to its thickness, for maintaining bending waves, characterized by determining a geometric configuration of the resonant panel (2), determining at least two, a frequency that can be coupled to the characteristic frequencies of the resonant modes of the natural bending waves, and which frequencies are interrelated, so that the corresponding low frequency, in principle suitable resonant modes, can be correlated with the corresponding vibration active and
    100 more active area portions that can be connected to another principally suitable frequency, are divided or matched with low and least active areas of vibration, and the resonant panel (2), or at least a portion thereof, comprising the acoustic device, or at least a portion thereof, according to relative geometric parameters we create it.
    20. The method of claim 19, wherein the resonant panel (2) defines the dimensions that are suitable in principle in different directions of the area.
    21. A method according to claim 18 or 20, wherein the resonant panel (2) defines a suitable frequency for determining the frequencies that are suitable for each other in the perpendicular directions of the area.
    22. A method for forming an acoustic device using a resonant panel (2) configured to maintain bending waves in a given geometric shape, in a region extending perpendicular to its thickness, characterized in that the area is geometrically located in two directions of rigidity of the resonant panel (2). further analyzing the parameters, the analysis can also be used in practice in the desired acoustic operation of the area portion, and in principle the appropriate frequencies to be associated with the natural bending waves are determined, the bending stiffness is determined in the above directions and the means for limiting the spread of the bending waves are determined, the resonant panel (2) defines an acoustically operating surface portion and then produces a limited operating surface resonant panel (2) as an acoustic device or acoustic device. as part of z.
    23. A method for forming an acoustic device comprising a resonant panel (2) configured to maintain bending waves in a predetermined area of a given geometric shape, in a direction perpendicular to its thickness, characterized by the geometric para101 meters defining the geometric shape of the area for two resonant panel (2) rigidity, the analysis can be applied in practice to the desired acoustic actuation of the area part, and in principle suitable frequencies that can be associated with natural bending waves are determined, adjusting the acoustic performance expected from the resonant panel (2), and suitable, in principle, suitable frequencies, appropriate bending stiffness in the above directions, and a resonant panel (2) made of a material having sufficient bending stiffness and structure as an acoustic device or as part of an acoustic device.
    Method according to any one of claims 1 to 23, characterized in that only resonant frequency resonant modes with a lower frequency than the upper frequency range are included in the analysis.
    25. The method of claim 24, wherein the defined resonant modes comprise at least twenty natural base frequencies and associated principally suitable frequencies that can be associated with the natural bending wave vibrations of the resonant panel (2).
    26. The method of claim 25, wherein the defined resonant modes comprise above the initial basic frequencies, the first twenty-five or more resonant modes.
    Method according to any one of claims 1 to 26, characterized in that one or more resonant modes (3) and / or damping elements (2P) suitable for controlling one or more resonant modes are selectively applied to each resonant panel (2) or resonant panels. .
    28. The method of claim 27, wherein a selective damping element (2P) is used at the intermediate point of the acoustically active area.
    102
    Method according to any one of claims 1 to 28, characterized in that the boundaries of the acoustically active region portion are selected in the same way as the delimiting edges of the resonant panel (2).
    The method according to any one of claims 1 to 29, characterized in that the acoustic device is formed as a loudspeaker (81) which resonates the resonant panel (81) of the loudspeaker (81) in the frame (1) along the side edges, with a suitable bending oscillation. recorded.
    31. The method of claim 30, wherein the resonant panel (2) is suspended in the frame (1) by a vibration control hanging member (3).
    Method according to any one of claims 1 to 30, characterized in that the active part of the resonant panel (2) is delimited by a cut-off (22C) of the path of the bending waves.
    33. A passive acoustic device according to the method of claims 1 to 32, characterized in that it is designed as a reflector, acoustic filter or acoustic ambient sound.
    34. An active acoustic device according to the method of claims 1 to 32, characterized in that an electronical signal converter (9) is attached to its resonant panel (2), which is an active acoustic device as a loudspeaker and / or microphone.
    35. An acoustic device having a resonant panel (2) extending in a direction perpendicular to its thickness, having at least one deliberately and consistently acoustically active portion of the area of the resonant panel (2) designed to maintain bending waves, the dispersion of resonances of the natural bending waves formed in said region; is determined by the values of the bending stiffness and geometric parameter, characterized in that the selected parameter values are used for the application of the device.
    103, a suitable distribution of resonant modes of natural bending waves suitable and feasible in the appropriate frequency range and mode of operation.
    36. The acoustic device of claim 35, wherein the parameters are selected in at least two different directions of the area of the resonant panel (2).
    37. An acoustic device formed in a direction perpendicular to its thickness as a resonant panel (2) having at least one deliberately and consistently acoustically active portion of the area of the resonant panel (2) designed to maintain bending waves, the distribution of resonances of the natural bending waves formed in said region; and the most active areas, and less and less active surface portions, determined by the values of the bending stiffness and geometric parameter of the area portion, characterized in that the values of the selected parameter of the resonant panel (2) result in a resonance distribution corresponding to the practicable optimum of the use of the device. less and least active surface portions are reduced.
    38. The acoustic device according to claim 35, 36 or 37, wherein a group of resonant modes and factors influencing distribution are dependent on at least one parameter, the other group of resonant modes and distribution influencing factors is a function of at least one other parameter. by selecting the values of the other parameter, the more active and even more active parts of the vibration represent the highest possible ratio in practice compared to less and less active areas of the vibration.
    39. A35-38 The acoustic device according to any one of claims 1 to 4, characterized in that the parameters can be associated with at least two different, in principle suitable frequencies, which can be assigned resonance modes for suitable frequencies.
    104
    40. An acoustic device formed in a direction perpendicular to its thickness as a resonant panel (2) having at least one deliberately and consistently acoustically active portion of the area of the resonant panel (2) designed to maintain bending waves, the resonances of which are resilient to natural bending waves. at least two different, in principle, suitable frequencies, which in principle are suitable frequencies depending on at least two selected parameters, characterized in that the resonant panel (2) is in principle suitable for determining the frequencies of the selected parameter, the characteristic frequencies of the resonant modes relative to each other for the acoustic properties desired. are arranged in a stepwise manner, spaced apart.
    41. An acoustic device according to claim 39 or 40, characterized in that by selecting the values of the parameters, the principally suitable frequencies are associated with each other so that the characteristic frequencies of the resonant modes are alternately formed with intermediate spaces.
    An acoustic device according to any one of claims 39, 40 or 41, characterized in that the principally suitable frequencies are defined in a defined manner with respect to the selected values of the various parameters.
    An acoustic device according to any one of claims 35 to 42, wherein the selected parameter values are selected values of geometric parameters and / or bending stiffnesses for different directions.
    An acoustic device according to any one of claims 35 to 43, characterized in that the selected parameter values are given as a ratio or percentage of similar parameters.
    45. The acoustic device of claim 43 or 44, wherein the selected parameter has values for the resonant panel (2) or
    At least the shape of the active area of the resonant panel with the defined bending stiffness of the resonant panel (2).
    46. The acoustic device of claim 45, wherein the selected two-way parameter values are the basic shape of the resonant panel (2).
    47. An acoustic device having a resonant panel (2) extending in a direction perpendicular to its thickness, wherein at least one defined geometric shape portion of the area of the resonant panel (2) is adapted to maintain bending waves, characterized in that at least the defined part of the area is the resonant natural bending waves. The method is based on the geometric parameter values that result from the defined, achievable distribution of the acoustic function and the operating frequency range.
    48. The acoustic device according to claim 47, wherein the geometric parameters are parameters in different directions of the defined area area.
    49. An acoustic device in the form of a resonant panel (2) extending in a direction perpendicular to its thickness, which resonant panel (2) is adapted to maintain bending waves, characterized in that the resonant modes of the natural bending waves determined by the geometric shape of the resonant panel (2) can be aligned at least two theoretically suitable frequencies, such that low frequency resonant modes associated with theoretically suitable frequencies are correlated and divided into at least some of the vibration active and even more active portions of the area which are resonant modes associated with one of the theoretically suitable frequencies and are less active in vibration and least active or corresponding parts of the area, which are associated with another principally suitable frequency.
    106
    50. The acoustic device according to claim 49, wherein the resonant panel (2) defines the correspondingly acceptable frequencies along its surface in different directions.
    51. The acoustic device according to claim 48 or 50, wherein the directions along the area are perpendicular to each other.
    52. The acoustic device according to claim 51, wherein the area is perpendicular to each other with longitudinal and width geometric parameters or dimensions, is substantially rectangular.
    53. The acoustic device according to claim 52, wherein in the substantially rectangular area, the bending rigidity of the resonant panel (2) along the length and width is substantially the same, the length and width dimensions are 13.4% or 37% - they differ from each other.
    54. The acoustic device according to claim 52 or 53, wherein the at least one diagonal corners of the area are of a different shape from the perpendicular to the sharp angle, the resonant modes resulting from the length and width dimensions.
    55. The acoustic device according to claim 54, wherein the degree of diagonal bending stiffness is varied by 10-15%, which is a diagonal bending rigidity thus approximating the longitudinal and lateral bending stiffness.
    56. The acoustic device according to claim 52 or 53, characterized in that the diagonal bending stiffness of the substantially rectangular area differs from the bending stiffness in the length and width direction to a degree that is advantageously affecting the length and width resonant modes.
    57. The acoustic device according to claim 51, wherein the area is small and large axis and is characterized by geometric parameters or dimensions, substantially ellipsoidal.
    107
    58. The acoustic device of claim 57, wherein the resonant panel (2) has the same bending rigidity along the small and large axes, the dimensions of the small and large axles vary by 18.2% or 34%.
    59. The acoustic device according to claim 51, wherein the area of the resonant panel (2) is substantially super-elliptical in shape, the large axis of which is selected as a geometric parameter selected as a function of power factor.
    60. The acoustic device according to claim 51, wherein the area of the resonant panel (2) is substantially super-elliptical in shape, which is an appropriate power factor for each relative size of the small and large axis of the super-ellipse.
    61. The acoustic device according to claim 59 or 60, wherein the resonant panel (2) has substantially the same bending stiffness along the small and large axis of the resonant panel (2), the size of the small and large axis is 13% 22% - or 32%, the power factor determined by the shape is 3.5-4.
    62. The acoustic device of claim 51, wherein the resonant panel (2) is a composite joint longitudinal axis extending transversely to the ellipse or super-ellipse along the longitudinal axis and perpendicular to the ellipse (1.1). -1.3): 1, in the area of large area 1.2: 1, the bending stiffness in the area corresponding to the additional area part is approximately the same.
    63. The acoustic device according to any one of claims 36, 46, 48, 50-52, 57, 59, 60, wherein the resonant panel (2) has different bending stiffness in different directions, but its dimensions has similar resonant modes similar to those of an equivalent size resonant panel (2) of equal bending in any direction.
    108
    64. The acoustic device according to claim 63, wherein the similarity of the resulting resonant modes extends to resonant modes, in principle, suitable frequencies.
    65. An acoustic device in the form of a resonant panel (2) extending in a direction perpendicular to its thickness, which resonant panel (2) is designed to maintain bending waves, characterized in that the resonant panel (2) has a geometric shape resulting in a non-constant bending strength. there are at least two principally suitable frequencies which, in principle, can be associated with the natural vibration waves and resonant modes of the resonant panel (2) according to the desired mode of operation.
    66. The acoustic device according to any one of claims 35 to 65, characterized in that the resonant panel (2) or resonant panels (2) are provided with a suspension and damping element (3, 2P), which elements are selectively one or more resonant. mode is applied in a specific manner affecting the resonant mode of the characteristic frequency of the mode.
    67. The acoustic device according to claim 66, characterized in that a damping element (2P) coupled to the intermediate point of the resonant panel (2) is used as a damping device.
    68. The acoustic device according to any one of claims 35 to 67, wherein the acoustically active area of the resonant panel (2) is delimited by the edges of the resonant panel (2).
    69. The acoustic device according to any one of claims 35 to 68, characterized in that the resonant panel (2) is in a frame (1) suspended in a manner that allows the formation of bending waves to the desired extent.
    70. The acoustic device according to claim 69, wherein the resonant panel (2) in the frame (1) comprises the edges of the resonant panel (2) and the vibration control hanging member (3) arranged in the frame (1). suspended.
    71. The acoustic device according to any one of claims 35 to 67, characterized in that the active surface of the resonant panel (2) is delimited by one or more incisions (22C) which extend the path of the bending waves.
    72. A33.-71. The acoustic device according to any one of claims 1 to 3, characterized in that the acoustic operating frequency range of the resonant panel (2) is greater than 4 kHz.
    73. A33.-71. The acoustic device according to any one of claims 1 to 3, characterized in that the resonant panel (2) has an acoustic operating frequency range including the coincidence frequency.
    74. A33.-71. The acoustic device according to any one of claims 1 to 4, characterized in that the resonant panel (2) has an acoustic operating frequency range below the coincidence frequency.
    75. A33.-74. The acoustic device according to any one of claims 1 to 3, characterized in that the ratio of the rigidity / unit surface mass bending to the resonant panel (2) in the resonant panel (2) of the defined size is consistent with the lowest bending vibration frequency below the operating frequency range.
    76. The acoustic device of claim 75, wherein the lowest bending vibration frequency is at least 20 Hz.
    77. The acoustic device according to claim 75 or 76, characterized in that the frequency of the lowest bending vibration is in the lower half of the operating frequency range, preferably in the lower third.
    78. The acoustic device according to claim 75, 76 or 77, wherein the resonant panel (2) has a minimum bending stiffness of 0.1 to 1000 Nm, a maximum of 4 to 3500 Nm, a unit surface area of 110 to at least 0 , 05 - 1.5 kg / m 2 , up to 1-4 kg / m 2 , depending on size and purpose of use.
    79. A33.-78. The acoustic device according to any one of claims 1 to 3, characterized in that the resonant panel (2) is a light and rigid structure, a laminated sandwich structure with a cellular core (22) and a core-covering shell (21), which is a device for supporting and resonating frequencies of the appropriate application. suitable for maintaining.
    80. The acoustic device of claim 79, wherein the cellular core (22) has a shear modulus of at least 10 megaPa, the Young modulus of the adhesive shell (21) being at least 1 gigaPa.
    81. The acoustic device according to claim 79, wherein the area of the resonant panel (2) is 0.1 m 2 or less, the lowest bending wave frequency is 100 Hz or greater, the bending stiffness is less than or equal to 10 Nm, 22) a shear modulus of 10 megaPa or greater, a Young modulus of a sheath (21) of between 0.5 and 2.5 gigaPa.
    82. The acoustic device according to claim 79, wherein the area of the resonant panel (2) is 0.1 to 0.3 m 2 , the lowest bending wave frequency is 70 Hz or greater, the bending stiffness is 5-50 Nm or greater , the core (22) has a shear modulus of at least 10 megaPa, typically 15 to 80 megaPa or more, with a Young modulus of the shell (21) having a value of between 2 and 70 gigaPa or greater.
    83. The acoustic device according to claim 79, wherein the area of the resonant panel (2) is 0.3 - 1 m 2 , the lowest bending wave frequency is 50 Hz or more, bending stiffness is at least 20 Nm, typically 50 - 500 Nm or greater, the core (22) having a shear modulus of at least 10 megaPa, typically 20-90 megaPa or more, a Youngmodule of the shell (21) having a value of between 2 and 70 gigaPa or greater.
    111
    84. The acoustic device according to claim 79, wherein the area of the resonant panel (2) is from 1 to 5 m or greater, the lowest bending wave frequency is 25 to 70 Hz, and the bending stiffness is typically 25 Nm, the shear modulus of the core (22). at least 30 megaPa, the Young modulus of the shell (21) is between 201000 gigaPa or greater.
    85. A79. An acoustic device according to any one of claims 84 to 84, characterized in that the core (22) is formed by a volume-dependent, additional vibration-aiding cell at a higher frequency than the bending vibrations.
    86. The acoustic device according to claim 79, wherein the core (22) is provided with a further, relatively high frequency, pressure / tension vibration assistant with a higher frequency than the bending vibrations.
    87. A79. Acoustic device according to any one of claims 84 to 84, characterized in that the cells of the core (22) sealed with shells (21) form tiny drums with a high resonance frequency.
    88. The acoustic device according to any one of claims 35 to 87, characterized in that the resonant panel (2) and its projecting form a further useful low frequency non-bending wave resonance system.
    Active acoustic device according to any one of claims 35 to 88, characterized in that the resonant panel (2) is connected to an electrical signal converter (9).
    90. The acoustic device according to any one of claims 34 to 89, characterized in that the core (22) of the resonant panel (2) and the assembly of the converter (9) form a further useful low frequency non-bending wave resonance system.
    91. The acoustic device according to claim 34, 89 or 90, characterized in that the actuator of the converter (9) is mechanically coupled to the resonant panel (2), in particular with respect to resistance.
    112
    92. Articles 34, 89-91 The acoustic device according to any one of claims 1 to 3, characterized in that the converter is a piezoelectric converter (74, 79).
    93. Articles 34, 89-91 The acoustic device according to any one of claims 1 to 4, characterized in that the converter is an electrodynamic converter (68, 69, 71) having a magnet (15) and a coil (13).
    94. The acoustic device according to claim 93, wherein the electromagnetic converter is a mobile coil electrodynamic converter (9).
    95. A34, 89-94. Acoustic device according to one of Claims 1 to 3, characterized in that the converter (9) is mounted on the surface of the resonant panel (2).
    96. The acoustic device according to any one of claims 34, 89 to 94, characterized in that the actuator of the converter (9) is arranged in the cavity (29) of the resonant panel (2).
    An acoustic device according to any one of claims 34, 89 to 96, characterized in that the actuator of the converter (9) occupies less than 0.1% of the surface of the resonant panel (2).
    98. The acoustic device according to any one of claims 34, 89 to 97, characterized in that the mass of the actuator of the converter (9) is one to two times the mass portion of the resonant panel (2) covered or induced by it.
    An acoustic device according to any one of claims 34, 89 to 98, characterized in that the whole of the converter (9) is arranged in the body of the resonant panel (2).
    100. The acoustic device according to any one of claims 34, 89 to 99, characterized in that the resonant panel (2) has a substantially rectangular, acoustically active area, and the converter (9) in the acoustically active area, from the corner to the active area. are located at 3/7 and / or 4/9 and / or 5/13 of the lateral edges of the area.
    113
    101. The acoustic device according to any one of claims 34, 89 to 99, characterized in that the resonant panel (2) has an essentially elliptical, acoustically active area, and the converter (9) in the acoustically active area, from the center to the half. measured on a large axis and half a small axis at 0.43 and 0.2.
    102. The acoustic device according to any one of claims 34, 89 to 99, characterized in that the resonant panel (2) has a substantially super-ellipsoidal, acoustically active area, and the converter (9) in the acoustically active region thereof. within the outer edges, at a center line length of 15% of the center point.
    103. The method according to any one of claims 1 to 32, characterized in that the analysis is extended to the vibration energy content of the defined natural resonant modes by area and area parts, further defined for the at least one location (9) within the active area. in which definition we first look for a domain within that area that supports more than or more than one of the specified resonance modes.
    104. The method according to any one of claims 1 to 32, characterized in that the analysis is extended to the vibration energy content of the defined natural resonant modes by area and area parts, further defined for the at least one location (9) within the active area. in which definition we first look for domains within the area that together support all or almost all of the specified resonance modes.
    105. A method for forming an acoustic device, the device having a resilient panel (2), which is bulky in a given area, capable of maintaining bending waves in the area, characterized by analyzing the vibration energy content of the area by area and area114 defined by the natural resonant modes. , thereby defining a space for a bending waveform transducer (9) in the area, which determines a range within the area that is more than or above the average of the specified resonance modes.
    106. The method of claim 105, wherein the area is defined as having two or more locations for a bending waveform converter (9), which determines areas within the area that are all of the defined resonance modes. or almost all of them support.
    107. The method according to any of claims 103 to 106, characterized in that two or more sites are determined by the analysis, in the determination of which ranges within the area are vibrating energies complementing each other in the defined resonance modes.
    108. The method according to any one of claims 103 to 109, characterized in that a converter (9) for bending waves is mounted on the resonant panel (2) to support resonant modes of the area.
    109. An acoustic device in the form of a resonant panel (2) extending in a direction perpendicular to its thickness, which resonant panel (2) is adapted to maintain bending waves, characterized in that the resonant panel (2) has at least one bending wave generating converter (9) directly coupled to the resonant panel (2) in at least one asymmetric position relative to the geometric shape of the resonant panel, which is 10-15% further in the direction of the center point at the edges of the area.
    110. The acoustic device of claim 109, wherein said one or more transducers (9) are located at a distance of at least 7% of said circumferential distance from said centerline and other axis lines.
    115
    111. The acoustic device according to claim 109 or 110, wherein the location of the one or more transducers (9) is located where the resonant modes of the natural bending waves of the resonant panel (2) form substantially one complex, are interconnected.
    112. The acoustic device according to claim 111, characterized in that the geometric ratios of the resonant panel (2) are designed to take account of the differences in the resonant modes of the natural bending waves in the preferred acoustic performance.
    113. The acoustic device according to claim 112, characterized in that it is configured as a microphone, the positions of its microphone transducers (9) on the resonant panel (2) within the active area, at different locations of the area, at different relative values of the coordinates.
    114. The acoustic device according to claim 34 or 89, characterized in that it is a resonant panel-like speaker (81) having a resonant panel (2) of a loudspeaker (81) equipped with a transducer (9) in a wall panel (6) with a hanging element surrounded and kept.
    115. The acoustic device of claim 114, wherein the resonant panel (2) and the surrounding wall panel (6) or frame box (8) are provided with a flexible suspension (17).
    116. An acoustic device according to claim 115, wherein the resonant panel (2) is provided with a flexible suspension (17) made of elastic material.
    117. The acoustic device according to any of claims 114 to 116, characterized in that the converter is fully and exclusively mounted on the resonant panel (2).
    116
    118. 4114. An acoustic device according to any one of claims 117, characterized in that the frame boxes (8) are wall-mounted, with an open-ended front box portion (52).
    119. The acoustic device according to claim 118, characterized in that the front open box portion (52) of the back is configured to fit a wall-mounted rear box portion (110).
    120. A114. An acoustic device according to any one of claims 119, characterized in that a subwoofer is connected to the frame box (8) of the resonant panel-like speaker (81).
    121. A114. An acoustic device according to any one of claims 120 to 120, wherein a resonant loudspeaker is incorporated into the frame box (8) of the resonant panel-like speaker (81).
    122. The acoustic device according to claim 34 or 89, characterized in that it is a resonant panel-like speaker (81) which is a resonant panel (2) of a loudspeaker (81) equipped with a resonant vibration converter (9) along its circumference, a resonant panel (2) in a support frame (1), in which piston-like movement is allowed.
    123. The acoustic device according to claim 122, characterized in that the frame (1) of the resonant panel (2) is part of the resonant panel (2).
    124. The acoustic device according to claim 122 or 123, wherein the resonant panel suspension member (3) is elastic.
    125. The acoustic device according to claim 123 or 124, characterized in that the frame (1) has a floor-adjustable stand (23) which rests on a stand (83) of the stand (23) which is substantially vertical (84) which supports (84) extends into branched arms (85 ', 86'), which have a frame (1) attached to the free ends of the arms (85 ', 86').
    117
    126. The acoustic device according to claim 125, characterized in that it has a rectangular speaker resonant panel (2), and that the free end of the arms (85 ', 86') of the stand (23) keeps it in the vicinity of the corners of the resonant panel (2). the frame (1).
    127. The acoustic device according to claim 125 or 126, characterized in that the stator part (9) of the converter (9) is mounted on or in the support (84) of the stand (23).
    128. The acoustic device according to any one of claims 125 to 127, characterized in that the stator part (9) of the converter (9) is fixed in a converter holder (88) formed on the support (84) of the stand (23).
    129. The acoustic device according to any one of claims 122 to 128, characterized in that it comprises a pair of balanced transducers (9).
    130. Al 22.-129. The acoustic device according to any one of claims 1 to 3, characterized in that the resonant panel (2) has a lightweight, light core (22) and a high modulus lightweight shell (21) covering both sides of the core.
    131. The acoustic device according to any one of claims 34 to 89, characterized in that the speaker speaker (81), in a frame box (8), has a resonant panel (2) that is permeable to a piston-like movement, the resonant panel (2) being exclusively resonant. a resonant bending wave generating transducer (9) having a kinetic connection is provided with a panel which further comprises a means for varying the air pressure of the frame box (8), causing the plug-in movement of the resonant panel (2).
    132. The acoustic device according to claim 131, wherein the means for changing the air pressure of the frame box (8) is a bass pump (11).
    133. The acoustic device according to claim 132, characterized in that the bass pump (11) has an audio box (185), a loudspeaker (42) arranged in the box, and an inner space of the box (185) in the interior of the frame box (8). has an acoustic pipeline (90).
    134. The acoustic device according to claim 133, characterized in that a sound absorbing resonant panel (51 ') is provided in the frame box and / or in the bass pump audio box (185).
    135. The acoustic device according to any one of claims 34 to 89, characterized in that the converter (9) is a mass-based vibrator, one of which is a roll (13) fixed on a cylindrical shape-retaining wall (18), the other part being a coil (13). a concentrically arranged magnet (15) movable in the axial direction relative to the coil and a resilient magnetic fastening means (19) which is fixed to the resonant panel (2) and the fastening elements (19).
    136. The acoustic device according to claim 135, characterized in that the winding wall (18) is rigidly and directly in the resonant panel secured by an adhesive bond (16, 20 ').
    Acoustic device according to claim 137 or 136, characterized in that the other end of the resilient magnetic fasteners (19) fixed at the two ends of the magnet are fixed to the opposing points (21) of the two-sided shell of the resonant panel (2).
    138. The acoustic device according to any one of claims 135, 136 or 137, characterized in that the two ends of the cylindrical wall (18) of the coil holder are sealed with end plates (119) or clamping blades (59), the magnet fasteners (19) being other the end is fixed to the end plates (119).
    139. A135.-138. Acoustic device according to one of Claims 1 to 3, characterized in that the coil (13) is fixed on the inner side of the cylindrical wall (18) of the coil holder.
    119
    140. The acoustic device according to any one of claims 135 to 139, characterized in that the coil-shaped cylindrical wall (18) and the coil (13) are adapted to be secured in the corresponding cavity (120) of the resonant panel (2).
    141. The acoustic device according to any one of claims 138 to 140, characterized in that the retaining plates (59) holding the magnet (15) are provided with an annular groove (136) providing a flexible suspension.
    142. The acoustic device according to claim 141, wherein the hanging plate (59) is framed by an annular groove (136) with an annular fastening member.
    143. The acoustic device according to claim 141 or 142, wherein the hanging plates (59) are covered with a disk-shaped magnetically shielding screen (121).
    144. A135.-139. The acoustic device according to any one of claims 1 to 3, characterized in that the coil holder cylindrical wall (18) and the coil (13) are adapted for rigid mounting on the surface of the resonant panel (2).
    145. The acoustic device according to claim 144, characterized in that the magnet (15) is comprised of two disc-shaped halves with disc-shaped poles (14 1 ), which have a flange of one of the poles (14 ') on the inside of each other. the rim (162) surrounds the annular coil (13) from the outside.
    146. The acoustic device according to claim 145, wherein the converter (9) is positioned between the panel pole pole (14 ') and the resonant panel (2) by a flexible suspension (17).
    147. A135-154. Acoustic device according to one of Claims 1 to 3, characterized in that the magnet (15) consists of two disc-like magnet halves, which are magnetically fixed together with an intermediate air gap filling element (14).
    120
    148. The acoustic device according to any one of claims 135 to 147, characterized in that the two sides of the resonant panel (2) have a push-pull transducer (9) consisting of two complementary halves, including a magnet and coil converter. (2) on both sides, facing each other and joined together by a fastener (93).
    149. The acoustic device according to claim 34 or 89, characterized in that the converter (9) is a piezoelectric converter whose piezo plate (27) is adapted to be mounted on the resonant panel (2) to be oscillated and which is a piezoelectric plate (27). a significant part of its area is relative to the movement of the resonant panel (2).
    150. The acoustic device according to claim 149, characterized in that the attachment element (93) of the piezo sheet (27) is arranged in the middle of the piezo-sheet (27).
    151. The acoustic device according to claim 149 or 150, characterized in that a weight (25) for securing the inertia is provided on the edge of the piezo sheet (27).
    152. The acoustic device according to claim 149, 150 or 151, wherein the means for attaching the piezo-sheet (27) is a light, rigid, resonant panel (2).
    153. The acoustic device according to any of claims 149 to 152, wherein the piezolate (27) has a crystal structure.
    154. The acoustic device according to any one of claims 34 to 89, characterized in that the vibrating transducer (9) vibrating on the surface of the resonant panel (2) is a mass-based vibrator having a roll (13) fixed on a cylindrical form-retaining wall (18). and a magnet (15) with a spindle pole (14 ') disposed axially in relation to the coil in the axial direction relative to the coil, arranged concentric with the coil (13), which surrounds the edge of one of the poles (14') and the outer edge (90 ') of the sleeve. the annular coil (13), which is adapted to be fixed to the resonant panel (2) by the magnet (15).
    155. The acoustic device of claim 154, wherein the magnet is fastened to the resonant panel (2) by means of a fastener (93).
    156. The acoustic device according to claim 155, wherein the resonant panel (2) has an outer thread portion (91) and an inner thread portion (92) of the overall engaging element (93).
    157. The acoustic device of claim 156, further comprising a washer (127) inserted between the surface of the resonant panel (2) and the polar pole (14 1 ) on the resonant panel.
    158. Al 54.-157. The acoustic device according to any one of claims 1 to 3, characterized in that the two sides of the resonant panel (2) have a push-pull transducer (9) consisting of two complementary halves, a magnet (15) and a coil (13) including a resonant panel (2). ) on both sides, facing each other and assembled with a fastener (93).
    159. The acoustic device according to claim 158, characterized in that the inner thread and outer thread portions (91, 92) of the fastener (93) have a clamping head (95) for the magnets (15), and the resonant panel (2) also comprises a resonant panel (2). ) and a base-like fastener (19) inserted between the resonant panel pole pole (14 ').
    160. A135.-159. The acoustic device according to any one of claims 1 to 3, characterized in that the acoustic device is a loudspeaker.
    161. The acoustic device according to claim 34 or 89, characterized in that it is a resonant panel-like speaker (81), the resonant panel (2) of said loudspeaker (81) having a resonant vibration, first and second transducers (9), which transducers (9) are spaced apart within the area of the resonant panel (2).
    122
    162. The acoustic device of claim 161, wherein the first and second transducers (9) are adapted to operate in different frequency bands.
    163. The acoustic device according to claim 161 or 162, characterized in that the first and second transducers (9) are fully and exclusively mounted on the resonant panel (2).
    164. The acoustic device according to claim 161, 162 or 163, characterized in that one of the transducers is an electromagnetic converter (9).
    165. The acoustic device according to any of claims 161 to 164, characterized in that one of the transducers is a piezoelectric converter (9).
    166. The acoustic device according to claim 34 or 89, characterized in that it has a resonant panel (2) of the first and second speakers, each of which is provided with a first and second oscillating transducer (9).
    167. A161.-165. The acoustic device according to any one of claims 1 to 3, characterized in that the first speaker resonant panel (2) has a second resonant panel (4) fixed to the hanging element (3) and mounted by a vibrating transducer (9).
    168. The acoustic device according to claim 167, wherein the second resonant panel (4) is arranged in the frame opening (82) of the first resonant panel (2).
    169. The acoustic device according to claim 167 or 168, characterized in that the transducer (9) of the second resonant panel (4) is mounted entirely and exclusively on the second resonant panel (4).
    170. The acoustic device according to claim 34 or claim 89, wherein said microphone is a speaker formed with a resonant panel (2), said panel (2) having a first oscillating transducer (9) and an incident acoustic energy. generated by the resonant panel (2) and by the microphone
    J
    It is equipped with a second vibration transducer (63) that responds to 123 sensed vibrations.
    171. The acoustic device of claim 170, wherein the first and second transducers (9, 63) are mounted on the resonant panel (2) as a whole.
    172. The acoustic device according to claim 170 or 171, characterized in that it has at least two second transducers (63).
    173. The acoustic device according to claim 172, characterized in that the incident-response converter (63) detecting the signals generated by the incident acoustic energy in the resonant panel (2), said transducer (63) has the detected signal with the acoustic response generated. It is connected to a comparator signaling (64, 65) input
    174. The acoustic device according to claim 173, characterized in that the response signal forming unit comprises a transponder and a comparator signal generator, said comparator signal generator (65) having a digital signal output (66).
    175. The acoustic device according to claim 34 or 89, characterized in that the resonant panel (2) is configured as a panel-shaped microphone with an incident acoustic energy in the panel (2) caused by a vibration sensor (63), the transducer (63) as a whole. and is mounted only on the resonant panel (2).
    176. The acoustic device according to claim 175, wherein the resonant is provided with at least two transducers (9, 63) in the area of the panel (2).
    177. The acoustic device according to claim 175 or 176, wherein the one or all of the transducers (9, 63) is a piezoelectric transducer.
    178. The acoustic device according to any one of claims 1 to 3, characterized in that the resonant panel (2) is held in the frame (1) by a flexible hanging member (3).
    124
    179. The acoustic device according to claim 178, wherein the frame (1) surrounds the resonant panel (2), and the resilient suspension member (3) is fixed to the edge of the resonant panel (2).
    180. The acoustic device according to claim 34 or 89, characterized in that it is a resonant panel-like loudspeaker or loudspeaker, and a ceiling-mounted panel (2), the acoustic device converter (9) in its entirety and exclusively on the resonant panel (2). is mounted.
    181. The acoustic device according to claim 181, wherein the resonant panel (2) has a sandwich structure, the cellular core (22) is covered with a high modulus shell (21) on both sides.
    182. The acoustic device of claim 180, wherein the material of the cellular core (22) is foamed plastic.
    183. The acoustic device according to claim 180, 181 or 182, characterized in that the resonant panel (2) of the acoustic device attached to the ceiling by its frame (1) is held in the frame (1) by a flexible hanging member (3).
    184. The acoustic device according to any one of claims 180 to 183, characterized in that its converter (9) is a mass-based vibrator.
    185. The acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that the resonant panel (2) is formed as a visual display board (48), which display panel (48) has a suitable surface for fixing sheets of paper, wherein the resonant panel (2) is mounted (9) in its entirety and exclusively on the resonant panel.
    186. The acoustic device according to claim 185 or 159, characterized in that the frame (1) has a protruding frame part (4 ') which covers the flexible hanging member (3).
    125
    187. The acoustic device according to claim 179 or 185, wherein the resonant panel (2) has a sandwich structure, the cellular core (22) being covered on both sides by a paper shell (21).
    188. The acoustic device of claim 187, wherein the core is a honeycomb structure of paper.
    189. Acoustic device according to any one of claims 185 to 188, characterized in that the converter (9) is a piezoelectric converter.
    190. The acoustic device according to any one of claims 34, 89, 179 or 180, wherein the resonant panel (2) has a reflective or light emitting surface, the resonant converter (9) of the resonant panel (2) burns and only mounted on the resonant panel (2).
    191. The acoustic device according to claim 190, characterized in that the rigid and light resonant panel (2) has a cellular core (22) with a sandwich structure made of aluminum foil, having a cellular core (22) on both sides, high. with a modular shell (21).
    192. The acoustic device of claim 191, wherein the shells (21) are made of fiber-reinforced plastic.
    193. Acoustic device according to any one of claims 178, 190 to 193, characterized in that on each side of the frame (1), a further panel-like loudspeaker (114) is arranged according to the left and right acoustic channels .
    194. The acoustic device according to claim 193, characterized in that the left and right speakers (114) are mounted on the frame (1) on the panel in the frame in a hinged manner.
    195. The acoustic device according to claim 193 or 194, wherein both speakers (114) are a loudspeaker with a resonant panel.
    126
    196. The acoustic device according to any of claims 190 to 195, wherein the surface of the resonant panel (2) occupied in the frame (1) is a projection screen.
    An acoustic device according to claim 196, characterized in that the resonant panel (2) included in the frame (1) is part of an audiovisual device.
    198. The acoustic device according to claim 197, wherein the resonant panel (2) included in the frame (1) is part of an audiovisual apparatus, part of which is at least one resonant panel backlight (117).
    199. The acoustic device according to claim 34 or 39, wherein the loudspeaker resonant panel (2) is part of a packing box (111) which is a converter (9) of the speaker panel (2) in its entirety and exclusively on the resonant panel ( 2) is installed.
    200. The acoustic device according to claim 199, wherein the resonant panel (2) has a sandwich structure, the cellular core (22) of the device is covered on both sides by a strong kraft shell (21).
    201. The acoustic device according to claim 199 or 200, characterized in that it has a piezoelectric transducer (9).
    202. The acoustic device of claim 201, wherein the piezoelectric transducer has a crystalline piezo-sheet (27).
    203. The acoustic device according to any of claims 199 to 202, wherein the resonant panel (2) forms one side of the packing box (111).
    204. The acoustic device according to claim 203, characterized in that the sound generator (112) driving the converter (2) of the resonant panel (2) is provided with a switch (53) arranged for actuation by the lid (139) of the packing box (111).
    127
    205. The acoustic device of claim 204, wherein the converter drive means comprises a sound generator, an amplifier, and an electrical element or battery.
    206. The acoustic device according to claim 34 or 89, wherein the acoustic acoustic device is part of a greeting card (144) in which the cardboard-shaped resonant panel (2) forms at least a portion of the greeting card which is a resonant converter of the resonant panel ( 9) is mounted entirely and exclusively on the resonant panel (2).
    207. The acoustic device according to claim 206, wherein the resonant panel (2) has a sandwich structure, the cellular core (22) of the device is covered on both sides by a strong kraft shell (21).
    208. The acoustic device according to claim 206 or 207, characterized in that it has a piezoelectric transducer (9).
    209. The acoustic device according to claim 208, wherein the piezoelectric transducer has a crystal piezolate (27).
    210. The acoustic device according to any one of claims 206 to 209, characterized in that, between the cover plate (145) and the back panel (146) of the greeting card (144), the sound generator (112) which drives the converter (9) opens a greeting card (144) , a switch (53) is provided.
    211. The acoustic device according to claim 210, characterized in that the greeting card (144) includes a sound generator, amplifier and a power supply battery or accumulator of the converter drive device.
    An acoustic device according to any one of claims 206 to 211, characterized in that the surface of the resonant panel (2) is adapted for printing text.
    128
    213. Articles 34, 89, 179 An acoustic device according to any one of claims 1 or 180, characterized in that it is part of another device or apparatus that uses it.
    214. An acoustic device according to claim 213, characterized in that it is an integral part of another application device or apparatus.
    215. The acoustic device according to claim 214, characterized in that one shell (21) of the resonant panel (2) formed by the shell (21) on both sides of the cellular core (22) forms an integral part of the application device or apparatus.
    216. The acoustic device according to claim 215, characterized in that the shell (21), which is an integral part of the application device or apparatus, is thinner than the average thickness of the corresponding part of the device or apparatus.
    217. The acoustic device according to claim 216, characterized in that a groove (100) acting as a resonant panel (2) and acting as a resilient member (3) is provided in the corresponding part of the application device or apparatus.
    218 A214-217. The acoustic device according to any one of claims 1 to 3, characterized in that the resonant panel (2) forms an outer wall or a part thereof of the application device or apparatus.
    An acoustic device according to claim 34 or 89, characterized in that the device is a loudspeaker (81) integrated into the housing (101) of the monitor (137) of the screen (37), which is a vibrating transducer of the resonant panel (2) of the speaker (81). (9) is mounted entirely and exclusively on the resonant panel (2).
    220. The acoustic device according to claim 219, wherein the display monitor (137) is an application device, the monitor housing (101) is that portion of the application device (137) that includes the resonant panel (2).
    129
    221. The acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that it is a loudspeaker (40) of a laptop computer (128) with a screen, a keyboard, and a resonant panel of speakers or speakers (40). (2), the vibration-generating transducer (9) of the panel (2) is mounted entirely and exclusively on the resonant panel (2).
    222. The acoustic device according to claim 221, characterized in that the laptop is integrated with the display (129) of the computer (128).
    223. The acoustic device according to claim 221 or 222, wherein the resonant panel (2) of both the speakers (39, 40) of the laptop computer (128) is mechanically connected to the laptop computer (128).
    224. The acoustic device according to claim 223, wherein the resonant panel (2) of the speaker (39, 40) on both sides of the laptop computer (128) is mechanically connected to the screen (129) of the laptop computer.
    225. The acoustic device according to claim 224, wherein the two side speakers (39,40) of the laptop computer are mechanically connected to the screen (129) by a hinge (34).
    226. The acoustic device according to claim 225, characterized in that the screen (129) is arranged in the lid (130) of the laptop computer (128), the loudspeakers (39, 40) being arranged in the side openings of the lid.
    An acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that a portable CD player (41) is formed as a loudspeaker (81) or loudspeaker (40) for a loudspeaker or a loudspeaker (81). (40) has a resonant panel (2), which has a vibration-generating transducer (9) of the panel (2) in its entirety and exclusively on the resonant panel (2).
    228. The acoustic device according to claim 227, characterized in that the CD player (41) having a bearing disc (86) bearing its body (85) has a cover (139) that can be shaken on a disc disk, the cover (139) having a loudspeaker (81) or a loudspeaker. (40) is mechanically fastened.
    229. The acoustic device according to claim 228, wherein the speakers (81) are hinged to the cover (139).
    230. The acoustic device according to claim 228, characterized in that the loudspeakers (81) are inserted in a lateral nest of the lid (139).
    231. The acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that a vehicle is formed as a loudspeaker (81) having a resonant panel (2) of the loudspeaker (81) and a fixed oscillating transducer thereof ( 9) is.
    232. The acoustic device according to claim 213, wherein the application means is a vehicle with a passenger compartment.
    233. The acoustic device according to claim 231 or 232, wherein the application means is a vehicle with a passenger compartment, the operating means comprises a subassembly comprising the speaker (81).
    234. The acoustic device according to claim 233, wherein the speaker unit comprises a seat backrest (203).
    235. The acoustic device according to claim 233, wherein the loudspeaker unit is a lining (104) of a door (140).
    236. An acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that an electronic instrument (137 '', 137 17 ) having a keypad (140 ') is formed as a loudspeaker (81). voice
    The wall (81) has a rigid and light resonant panel (2) and a fixed vibration-generating transducer (9) mounted on the converter (9) as a whole and exclusively on the resonant panel (2).
    237. The acoustic device according to any of claims 34, 89, 178 or 179 of claim 213, characterized in that the application device is the instrument (137 '', 137, 17 ) which uses the loudspeaker (81). part of it.
    238. Acoustic device according to claim 236 or 237, characterized in that the legs (139 ') consisting of instrument (137'', 137 IV) instrument body (138), the lower part of the region containing the speaker (81).
    239. The acoustic device according to claim 238, wherein the panel (2) of the speaker (81) is arranged in a substantially vertical plane.
    240. The acoustic device according to claim 239, wherein the resonant panel (2) of the speaker (81) is held in the frame (1) by a flexible hanging member (3) and the frame (1) is provided for the instrument (137 '). 137 IV ).
    241. An acoustic device according to any one of claims 34, 89, 178 or 179, characterized in that it is formed as part of a dispensing machine having a folding device, selector buttons and a dispensing window, the resonant panel (2) of the acoustic device and there is a fixed vibration transducer (9) which is mounted on the converter (9) in its entirety and exclusively on the resonant panel (2).
    242. The acoustic device according to claim 213, wherein the acoustic device is an automatic vending machine that uses an acoustic device loudspeaker (81) or a microphone or speaker combined with a microphone.
    132
    243. The acoustic device according to claim 241 or 242, wherein the resonant panel (2) of the acoustic device used is implemented as a visual display board.
    244. The acoustic device according to claim 241, 242 or 243, characterized in that its resonant panel (2) is held in the frame (1) by a flexible hanging member (3) and is held by the frame (1) in the body of the dispensing machine. is integrated.
    245. The acoustic device according to any one of claims 241 to 244, characterized in that it also has a microphone transducer (9) for detecting the second waveform wave-mounted acoustic energy mounted on the resonant panel.
    246. The acoustic device according to claim 245, characterized in that at least two second transducers (63) are present, the signal-generating transducer (63) detecting the signals generated by the incident acoustic energy in the resonant panel (2), the detected signal being generated by it is connected to an acoustic response signal comparator (64, 65).
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HU9802067A 1995-09-02 1996-09-02 Method for making an acoustic device, passive and active acoustic devices HU9802067A3 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GBGB9517918.0A GB9517918D0 (en) 1995-09-02 1995-09-02 Acoustic device
GBGB9522281.6A GB9522281D0 (en) 1995-10-31 1995-10-31 Acoustic device
GBGB9606836.6A GB9606836D0 (en) 1996-03-30 1996-03-30 Acoustic device
PCT/GB1996/002145 WO1997009842A2 (en) 1995-09-02 1996-09-02 Acoustic device

Publications (2)

Publication Number Publication Date
HU9802067A2 true HU9802067A2 (en) 1998-12-28
HU9802067A3 HU9802067A3 (en) 2002-09-30

Family

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Family Applications (1)

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Families Citing this family (206)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6553124B2 (en) 1995-09-02 2003-04-22 New Transducers Limited Acoustic device
US6522760B2 (en) 1996-09-03 2003-02-18 New Transducers Limited Active acoustic devices
US6606390B2 (en) 1996-09-03 2003-08-12 New Transducer Limited Loudspeakers
US7010138B1 (en) 1996-09-03 2006-03-07 New Transducers Limited Loudspeakers
US6278787B1 (en) 1996-09-03 2001-08-21 New Transducers Limited Loudspeakers
US6546106B2 (en) 1996-09-03 2003-04-08 New Transducers Limited Acoustic device
GB9701983D0 (en) 1997-01-31 1997-03-19 New Transducers Ltd Electro-dynamic exciter
GB9704486D0 (en) * 1997-03-04 1997-04-23 New Transducers Ltd Acoustic devices etc
GB9705979D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Passenger vehicles
IL134749D0 (en) 1997-09-03 2001-04-30 New Transducers Ltd Trim panel comprising an integral acoustic system
GB9722079D0 (en) * 1997-10-21 1997-12-17 New Transducers Ltd Loudspeaker suspension
DE19757099A1 (en) 1997-12-20 1999-06-24 Nokia Deutschland Gmbh Contacting for a sound reproduction arrangement according to the flexural wave principle
JP4317957B2 (en) * 1998-01-16 2009-08-19 ソニー株式会社 Speaker device and electronic device incorporating speaker device
CN1287766B (en) * 1998-01-20 2010-06-23 新型转换器有限公司 Active acoustic devices comprising panel members
AU2002300608B2 (en) * 1998-01-20 2005-10-06 New Transducers Limited Active Acoustic Devices Comprising Panel Members
TW450011B (en) 1998-02-10 2001-08-11 New Transducers Ltd Acoustic devices
DE19806509B4 (en) * 1998-02-17 2007-12-13 Harman Becker Automotive Systems Gmbh Device for information reproduction
GB9806994D0 (en) * 1998-04-02 1998-06-03 New Transducers Ltd Acoustic device
GB9807316D0 (en) 1998-04-07 1998-06-03 New Transducers Ltd Loudspeaker
AR019105A1 (en) * 1998-04-28 2001-12-26 New Transducers Ltd Method for determining the location or locations advantageous to position a transducer device bending waves.
GB9811098D0 (en) * 1998-05-23 1998-07-22 New Transducers Ltd Panel-form loudspeaker
GB9812225D0 (en) * 1998-06-05 1998-08-05 Medicine Acoustic devices
DE19825866A1 (en) 1998-06-10 1999-12-16 Nokia Deutschland Gmbh Panel loudspeaker
GB2360665B (en) * 1998-06-22 2003-01-15 Slab Technology Ltd Loudspeakers
DE29923450U1 (en) * 1998-06-22 2000-09-28 Slab Technology Ltd Albany speaker
JP4614534B2 (en) * 1998-07-03 2011-01-19 ニュー トランスデューサーズ リミテッド Resonant panel loudspeaker
WO2000005920A1 (en) * 1998-07-21 2000-02-03 New Transducers Ltd Digital loudspeaker
IL140997D0 (en) 1998-07-29 2002-02-10 New Transducers Lim1Ted Loudspeaker drive unit having a resonant panel-form member
GB9816394D0 (en) * 1998-07-29 1998-09-23 New Transducers Ltd Acoustic devices
GB9818719D0 (en) * 1998-08-28 1998-10-21 New Transducers Ltd Vubration exciter
GB9818959D0 (en) * 1998-09-02 1998-10-21 New Transducers Ltd Panelform loudspeaker
DE19843079A1 (en) 1998-09-19 2000-03-23 Nokia Deutschland Gmbh Multi soundboard
GB9822246D0 (en) * 1998-10-13 1998-12-09 New Transducers Ltd Loudspeakers
GB9824256D0 (en) * 1998-11-06 1998-12-30 New Transducers Ltd Acoustic devices etc.
CN1140158C (en) * 1998-11-06 2004-02-25 新型转换器有限公司 Loudspeakers comprising phase uncorrelated diffuse sound source
GB9826164D0 (en) * 1998-11-30 1999-01-20 New Transducers Ltd Acoustic devices
GB9826325D0 (en) * 1998-12-02 1999-01-20 New Transducers Ltd Subwoofer loudspeaker
CN1329809A (en) * 1998-12-09 2002-01-02 新型转换器有限公司 Loudspeaker
AU4153899A (en) 1999-01-22 2000-08-07 Hosiden Besson Limited Loud speaker mounting arrangement
GB9901895D0 (en) * 1999-01-29 1999-03-17 New Transducers Ltd Loudspeakers
US6676879B1 (en) 1999-01-29 2004-01-13 New Transducers Limited Method of making vehicle interior trim panel with integral loudspeaker
GB9902442D0 (en) * 1999-02-05 1999-03-24 New Transducers Ltd A headphone
GB9902585D0 (en) * 1999-02-06 1999-03-24 New Transducers Ltd Vibration exciter
GB9903044D0 (en) * 1999-02-11 1999-03-31 New Transducers Ltd Loudspeakers
GB9905038D0 (en) * 1999-03-05 1999-04-28 New Transducers Ltd Loudpeakers
GB9905373D0 (en) * 1999-03-10 1999-05-05 New Transducers Ltd Inertial vibration exciters
GB2349034A (en) * 1999-04-16 2000-10-18 Hosiden Besson Ltd Supporting surround for active panel of distributed mode speaker
GB9909157D0 (en) * 1999-04-22 1999-06-16 New Transducers Ltd Small electronic articles for personal use
GB9910216D0 (en) * 1999-04-29 1999-06-30 New Transducers Ltd Vibration exciter
AU4419000A (en) * 1999-04-29 2000-11-17 New Transducers Limited Moving coil driver
GB9910220D0 (en) * 1999-04-29 1999-06-30 New Transducers Ltd Loudspeakers
US6372066B1 (en) 1999-05-06 2002-04-16 New Transducers Limited Vibration exciter
AU4419600A (en) * 1999-05-06 2000-11-21 New Transducers Limited Vibration exciter
GB9911156D0 (en) 1999-05-14 1999-07-14 New Transducers Ltd Loudspeakers
WO2000070910A2 (en) * 1999-05-14 2000-11-23 New Transducers Limited Bending wave panel loudspeakers
GB9911271D0 (en) * 1999-05-15 1999-07-14 New Transducers Ltd Acoustic device
GB9913465D0 (en) * 1999-06-10 1999-08-11 New Transducers Ltd Acoustic device
US6456723B1 (en) 1999-06-10 2002-09-24 New Transducers Limited Acoustic device
GB9915361D0 (en) * 1999-07-02 1999-09-01 New Transducers Ltd Acoustic device
US6795561B1 (en) 1999-07-08 2004-09-21 New Transducers Limited Panel drive
GB9916091D0 (en) * 1999-07-08 1999-09-08 New Transducers Ltd Panel drive
CN1390431A (en) 1999-07-23 2003-01-08 数字声能公司 Flat panel speaker
GB9917908D0 (en) * 1999-07-30 1999-09-29 New Transducers Ltd Loudspeakers
US6590993B2 (en) 1999-09-06 2003-07-08 Koninklijke Philips Electronics N.V. Panel-shaped loudspeaker
DE19944802C2 (en) 1999-09-20 2003-08-28 Harman Audio Electronic Sys Door
GB9924643D0 (en) * 1999-10-19 1999-12-22 New Transducers Ltd Electronic apparatus containing loudspeaker
GB9926096D0 (en) * 1999-11-04 2000-01-12 New Transducers Ltd Audio-visual apparatus
DE19955867A1 (en) * 1999-11-22 2001-06-21 Harman Audio Electronic Sys Flat loudspeaker arrangement for bass reproduction
GB9928456D0 (en) * 1999-12-02 2000-01-26 New Transducers Ltd Loudspeakers
GB9929731D0 (en) * 1999-12-16 2000-02-09 New Transducers Ltd Acoustic device
GB9929734D0 (en) * 1999-12-16 2000-02-09 New Transducers Ltd Structural materials
CZ20022173A3 (en) * 1999-12-23 2002-09-11 New Transducers Limited Device responsive to contact
US7157649B2 (en) 1999-12-23 2007-01-02 New Transducers Limited Contact sensitive device
DE10001410C2 (en) * 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flat loudspeaker arrangement
AU2863001A (en) * 2000-01-20 2001-07-31 Amina Technologies Ltd Display apparatus
US6885753B2 (en) 2000-01-27 2005-04-26 New Transducers Limited Communication device using bone conduction
TW511391B (en) 2000-01-24 2002-11-21 New Transducers Ltd Transducer
US6865277B2 (en) 2000-01-27 2005-03-08 New Transducers Limited Passenger vehicle
US6965678B2 (en) 2000-01-27 2005-11-15 New Transducers Limited Electronic article comprising loudspeaker and touch pad
US7151837B2 (en) 2000-01-27 2006-12-19 New Transducers Limited Loudspeaker
GB0003883D0 (en) * 2000-02-18 2000-04-05 New Transducers Ltd Loudspeakers
AU4430001A (en) * 2000-03-18 2001-10-03 Newlands Technology Limited Dual mode audio device
GB0009133D0 (en) * 2000-04-14 2000-05-31 New Transducers Ltd Acoustic device and method for driving it
GB0010998D0 (en) * 2000-05-08 2000-06-28 New Transducers Ltd Acoustic device
US7155021B2 (en) 2000-05-08 2006-12-26 Koninklijke Philips Electronics N.V. Loudspeaker having an acoustic panel and an electrical driver
DE10025460B4 (en) * 2000-05-23 2004-03-18 Harman Audio Electronic Systems Gmbh tweeter
WO2001093628A2 (en) * 2000-05-31 2001-12-06 New Transducers Limited Loudspeaker of the bending wave type and exciter therefor
EP1170977A1 (en) 2000-07-04 2002-01-09 Tai-Yan Kam Laminated composite panel-form loudspeaker
GB0018996D0 (en) 2000-08-03 2000-09-20 New Transducers Ltd Bending wave loudspeaker
GB0018997D0 (en) * 2000-08-03 2000-09-20 New Transducers Ltd Bending wave loudspeaker
US6826285B2 (en) 2000-08-03 2004-11-30 New Transducers Limited Bending wave loudspeaker
GB0019701D0 (en) * 2000-08-11 2000-09-27 New Transducers Ltd Loudspeaker
GB0022913D0 (en) * 2000-09-19 2000-11-01 New Transducers Ltd Loudspeaker
GB0023134D0 (en) * 2000-09-21 2000-11-01 New Transducers Ltd Loudspeaker driver
US6751329B2 (en) 2000-09-21 2004-06-15 New Transducers Limited Loudspeaker driver
US7372968B2 (en) 2000-11-08 2008-05-13 New Transducers Limited Loudspeaker driver
DE10058102C2 (en) * 2000-11-23 2003-07-03 Harman Audio Electronic Sys Electrodynamic bending moment driver
DE10058104C2 (en) * 2000-11-23 2003-10-30 Harman Audio Electronic Sys Electromagnetic driver for a plate loudspeaker
JP3632594B2 (en) 2000-11-28 2005-03-23 日本電気株式会社 Electronic equipment
GB0029082D0 (en) * 2000-11-28 2001-01-10 New Transducers Ltd Display systems
US6839444B2 (en) 2000-11-30 2005-01-04 New Transducers Limited Loudspeakers
US6911901B2 (en) 2000-12-20 2005-06-28 New Transducers Limited Multi-functional vibro-acoustic device
GB0031246D0 (en) * 2000-12-20 2001-01-31 New Transducers Ltd Vibro-acoustic/human machine interface device
GB0102865D0 (en) 2001-02-06 2001-03-21 Secr Defence Brit Panel form loudspeaker
US6765993B2 (en) 2001-03-09 2004-07-20 General Electric Company Information gathering system for remotely monitoring and diagnosing equipment condition
GB0105980D0 (en) * 2001-03-10 2001-05-02 Harris Hynd Ltd Speaker arrangement
US6708797B2 (en) * 2001-04-23 2004-03-23 Gilbarco Inc. Display enclosure having thin speaker
CN1535556A (en) * 2001-05-11 2004-10-06 新型转换器有限公司 Loadspeakers
EP1274272A1 (en) * 2001-06-19 2003-01-08 Chao-Hsien Lin The application of invisible speaker and the method for fabricating the same
US7302068B2 (en) 2001-06-21 2007-11-27 1 . . .Limited Loudspeaker
US7002070B2 (en) 2001-06-22 2006-02-21 Shelley Katz Electronic piano
GB0116310D0 (en) 2001-07-04 2001-08-29 New Transducers Ltd Contact sensitive device
GB0117665D0 (en) * 2001-07-20 2001-09-12 New Transducers Ltd Passenger vehicle
GB0117662D0 (en) * 2001-07-20 2001-09-12 New Transducers Ltd Loudspeaker system
GB0117663D0 (en) * 2001-07-20 2001-09-12 New Transducers Ltd Listening anti eavesdropping device
GB0120130D0 (en) * 2001-08-17 2001-10-10 New Transducers Ltd Loudspeaker
US7062051B2 (en) 2001-08-17 2006-06-13 New Transducers Limited Acoustic device
DE10144787C5 (en) * 2001-09-11 2009-11-12 Continental Automotive Gmbh Vehicle with a Schallabstrahlelement
EP1322137A3 (en) * 2001-11-06 2008-08-27 Hosiden Besson Limited Portable speaker systems and applications thereof
DE10154915B4 (en) * 2001-11-08 2005-02-03 Harman/Becker Automotive Systems Gmbh (Harman Division) Flat loudspeaker arrangement
GB2382256A (en) * 2001-11-20 2003-05-21 Ds Smith Collapsible, foldable loudspeaker
US20030124271A1 (en) * 2001-12-31 2003-07-03 Michael Rajendran S. Vehicle trim panel/radiator element system
JP2003224896A (en) * 2002-01-29 2003-08-08 Jamco Corp Ceiling speaker system for aircraft
US6988339B2 (en) 2002-02-06 2006-01-24 Andersen Corporation Specialty media window
US7426804B2 (en) 2002-02-06 2008-09-23 Andersen Corporation Specialty display window
JP3886391B2 (en) 2002-02-15 2007-02-28 シャープ株式会社 Card-type device and electronic device having the same
ITMI20021806A1 (en) 2002-08-08 2004-02-09 Artemide Group S P A multifunction lighting fixture
US7010143B2 (en) 2002-08-22 2006-03-07 Tai-Yan Kam Rectangular panel-form loudspeaker and its radiating panel
US6871149B2 (en) 2002-12-06 2005-03-22 New Transducers Limited Contact sensitive device
GB0317331D0 (en) 2003-07-24 2003-08-27 New Transducers Ltd Acoustic device
GB0321617D0 (en) 2003-09-10 2003-10-15 New Transducers Ltd Audio apparatus
DE10358760B3 (en) * 2003-12-12 2005-05-25 Zöllner GmbH Barrier for construction sites, especially railway construction sites, comprises lateral holding posts and a barrier plate extending in a vertical plane between these posts and provided with an exciter that can emit sound when excited
GB0400323D0 (en) 2004-01-08 2004-02-11 New Transducers Ltd Loudspeakers
DE102004028664A1 (en) * 2004-06-12 2006-01-19 Puren Gmbh Vibration body of a speaker system
KR100698256B1 (en) * 2004-07-16 2007-03-22 엘지전자 주식회사 A Speaker Equipment using Display Window
US10158337B2 (en) 2004-08-10 2018-12-18 Bongiovi Acoustics Llc System and method for digital signal processing
JP2008515326A (en) * 2004-09-30 2008-05-08 ピーエスエス・ベルギー・エヌブイPSS Belgium NV Loudspeaker with acoustic membrane
TW200706049A (en) * 2005-05-12 2007-02-01 Kenwood Corp Screen speaker system
GB0510484D0 (en) 2005-05-24 2005-06-29 New Transducers Ltd Acoustic device
ITMI20051106A1 (en) * 2005-06-13 2006-12-14 Enrico Ciresa S R L The sound panel for the diffusion of sound and music, and the manufacturing process thereof.
JP2007096439A (en) * 2005-09-27 2007-04-12 Kawai Musical Instr Mfg Co Ltd Diaphragm driver and music sound generator
US8204266B2 (en) 2005-10-21 2012-06-19 Sfx Technologies Limited Audio devices
US8284955B2 (en) 2006-02-07 2012-10-09 Bongiovi Acoustics Llc System and method for digital signal processing
US10069471B2 (en) 2006-02-07 2018-09-04 Bongiovi Acoustics Llc System and method for digital signal processing
RU2395853C2 (en) * 2006-04-12 2010-07-27 Электролюкс Хоум Продактс Корпорейшн Н.В. Domestic electrical appliance
GB0617551D0 (en) * 2006-09-07 2006-10-18 New Transducers Ltd Electromagnetic actuator
US7983432B2 (en) * 2006-09-29 2011-07-19 Shure Acquisition Holdings, Inc. Point excitation placement in an audio transducer
DE102006050068B4 (en) 2006-10-24 2010-11-11 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Apparatus and method for generating an environmental signal from an audio signal, apparatus and method for deriving a multi-channel audio signal from an audio signal and computer program
AT510069T (en) 2007-08-01 2011-06-15 Avs Mellingen Gmbh Method for manufacturing a changing element and a converting element made for the process for a traffic conductive wall
DE102007003165A1 (en) * 2007-01-22 2008-07-24 Siemens Ag Area loudspeaker and method for adjusting the vibration behavior of a vibration system
DE102007030811A1 (en) * 2007-04-26 2008-11-06 Airbus Deutschland Gmbh Flat speaker
WO2008136822A2 (en) * 2007-05-03 2008-11-13 Agere Systems Inc. Integrated audiovisual output device
DE102007034161A1 (en) 2007-07-23 2009-01-29 Siemens Ag Sound reproducing and recording method for e.g. emergency telephone at highway, involves partially executing sound reproduction and/or sound recording for exchange of acoustic information by impact sound of emergency call equipment
DE102007040062A1 (en) * 2007-08-24 2009-02-26 Heinen, Annegret Broadband Exciter
JP5178108B2 (en) * 2007-09-21 2013-04-10 三洋電機株式会社 Diaphragm and speaker equipped with the same
GB0724149D0 (en) 2007-12-11 2008-01-23 New Transducers Ltd Touch-sensitive device
PL2141691T3 (en) * 2008-07-03 2011-03-31 Preform Gmbh Adaptable noise creation device
CN102119536B (en) 2008-07-17 2015-08-26 新传感器有限公司 inertial vibration exciter
GB2462465B (en) 2008-08-08 2013-02-13 Hiwave Technologies Uk Ltd Touch sensitive device
GB2464117B (en) 2008-10-03 2015-01-28 Hiwave Technologies Uk Ltd Touch sensitive device
DE102008062809B4 (en) * 2008-12-23 2012-01-19 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. An article of furniture comprising a multi-layer system for providing electrical functionality
GB0905692D0 (en) 2009-04-02 2009-05-20 Tno Touch sensitive device
EP2417511B1 (en) 2009-04-09 2016-11-09 New Transducers Limited Touch sensitive device
GB2472092A (en) 2009-07-24 2011-01-26 New Transducers Ltd Audio system for an enclosed space with plural independent audio zones
GB2474047B (en) 2009-10-02 2014-12-17 New Transducers Ltd Touch sensitive device
WO2011051722A2 (en) 2009-10-29 2011-05-05 New Transducers Limited Touch sensitive device
GB2482190A (en) 2010-07-23 2012-01-25 New Transducers Ltd Methods of generating a desired haptic sensation in a touch sensitive device
JP5609410B2 (en) * 2010-08-11 2014-10-22 ヤマハ株式会社 Speaker device
JP5664168B2 (en) 2010-11-24 2015-02-04 トヨタ紡織株式会社 In-vehicle speaker device
JP5732860B2 (en) * 2011-01-13 2015-06-10 ヤマハ株式会社 Electronic keyboard instrument
JP5729280B2 (en) 2011-11-30 2015-06-03 ヤマハ株式会社 Electrostatic speaker
GB2503423A (en) 2012-05-11 2014-01-01 Deben Acoustics Balanced-mode radiator with multiple voice coil assembly
US8983098B2 (en) 2012-08-14 2015-03-17 Turtle Beach Corporation Substantially planate parametric emitter and associated methods
DE102012025313B3 (en) * 2012-12-22 2014-02-20 Audi Ag Transducer for converting electrical signals into airborne sound, has frame that is formed by two frame elements, which are tightly connectable to each other, in frame plane
JP5842834B2 (en) 2013-01-22 2016-01-13 ヤマハ株式会社 Soundboard shaker
US9883318B2 (en) 2013-06-12 2018-01-30 Bongiovi Acoustics Llc System and method for stereo field enhancement in two-channel audio systems
US9264004B2 (en) 2013-06-12 2016-02-16 Bongiovi Acoustics Llc System and method for narrow bandwidth digital signal processing
US20150010173A1 (en) * 2013-07-05 2015-01-08 Qualcomm Incorporated Apparatus and method for providing a frequency response for audio signals
US9906858B2 (en) 2013-10-22 2018-02-27 Bongiovi Acoustics Llc System and method for digital signal processing
DE102014000932A1 (en) * 2014-01-20 2015-07-23 Herholz Vertrieb Gmbh & Co. Kg Device for processing signals in the field of audio technology
WO2015121862A1 (en) * 2014-02-14 2015-08-20 Yariv Erad Apparatus and method for transferring signals through a vibrating material
CN104935913B (en) * 2014-03-21 2018-12-04 杜比实验室特许公司 Handle the audio or video signal of multiple device acquisitions
US9615813B2 (en) 2014-04-16 2017-04-11 Bongiovi Acoustics Llc. Device for wide-band auscultation
WO2015166285A1 (en) 2014-05-01 2015-11-05 Hugh Brogan Speaker device
US9564146B2 (en) 2014-08-01 2017-02-07 Bongiovi Acoustics Llc System and method for digital signal processing in deep diving environment
US9615189B2 (en) 2014-08-08 2017-04-04 Bongiovi Acoustics Llc Artificial ear apparatus and associated methods for generating a head related audio transfer function
US9525943B2 (en) 2014-11-24 2016-12-20 Apple Inc. Mechanically actuated panel acoustic system
US9660596B2 (en) 2015-01-23 2017-05-23 Tectonic Audio Labs Audio transducer stabilization system and method
DE102015002172A1 (en) * 2015-02-24 2016-08-25 Telegärtner Elektronik GmbH Door intercom with rear-mounted sound source
US9638672B2 (en) 2015-03-06 2017-05-02 Bongiovi Acoustics Llc System and method for acquiring acoustic information from a resonating body
DE102015104478A1 (en) 2015-03-25 2016-09-29 Bruno Winter Flat speaker
EP3338464A1 (en) * 2015-08-20 2018-06-27 The University of Rochester Systems and methods for controlling plate loudspeakers using modal crossover networks
DE102015217778B4 (en) * 2015-09-17 2019-05-29 Robert Bosch Gmbh Acoustic sensor with a membrane and an electroacoustic transducer
WO2017087495A1 (en) 2015-11-16 2017-05-26 Bongiovi Acoustics Llc Surface acoustic transducer
US9621994B1 (en) 2015-11-16 2017-04-11 Bongiovi Acoustics Llc Surface acoustic transducer
CN105357619B (en) * 2015-12-11 2018-10-26 广州大学 A kind of digital deaf-aid frequency resolution Enhancement Method
IT201600082006A1 (en) * 2016-08-03 2018-02-03 Enrico Ciresa S R L Sound Diffuser Accessory
WO2018070399A1 (en) * 2016-10-13 2018-04-19 パナソニックIpマネジメント株式会社 Flat speaker and display device
IT201600111720A1 (en) * 2016-11-08 2018-05-08 Hifiprpo Di Ferracuti Mauro sound frame with emphasis acoustic device
DE102016226006A1 (en) * 2016-12-22 2018-06-28 Silberform Aktiengesellschaft Device for exciting vibrations and use of such a device
US20190028787A1 (en) * 2016-12-27 2019-01-24 Sony Corporation Flat Panel Speaker And Display Unit
GB2560878A (en) 2017-02-24 2018-10-03 Nvf Tech Ltd A panel loudspeaker controller and a panel loudspeaker
CN107509144A (en) * 2017-08-25 2017-12-22 南京大学 A kind of nonreciprocal acoustic apparatus
WO2019081918A1 (en) 2017-10-23 2019-05-02 Hugh Brogan An improved speaker
US10264348B1 (en) 2017-12-29 2019-04-16 Nvf Tech Ltd Multi-resonant coupled system for flat panel actuation
US20190369730A1 (en) 2018-06-01 2019-12-05 Nvf Tech Ltd. Vibrating the surface of an electronic device to raise the perceived height at a depression in the surface

Family Cites Families (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2063945A (en) * 1933-08-02 1936-12-15 Pierce George Washington Diaphragm and method
US2172066A (en) * 1937-07-21 1939-09-05 Lewis B Logsdon Announcing system for ships
US3247925A (en) * 1962-03-08 1966-04-26 Lord Corp Loudspeaker
US3311712A (en) * 1963-11-27 1967-03-28 Allen Alan A Sonic transducer
DE1132593B (en) * 1965-04-05 1962-07-05 Bolt Beranek & Newman Acoustically active panel, in particular for coupling to an electroacoustic transducer
US3423543A (en) * 1965-06-24 1969-01-21 Harry W Kompanek Loudspeaker with piezoelectric wafer driving elements
US3422921A (en) * 1966-04-25 1969-01-21 Lord Corp Sound attenuating wall for blocking transmission of intelligible speech
US3449531A (en) * 1968-01-09 1969-06-10 William J Ashworth Electro-mechanical transducer
US3636281A (en) * 1969-01-13 1972-01-18 Robert T Cozart Loudspeaker using wall as diaphragm
DE2319667C2 (en) * 1973-04-18 1974-12-05 Manfred 6600 Saarbruecken Jaegle
JPS5748153Y2 (en) * 1977-11-26 1982-10-22
DE2819615A1 (en) * 1978-05-05 1979-11-08 Messerschmitt Boelkow Blohm sound distribution characteristics method of achieving gleichmaessiger
EP0054945B1 (en) * 1980-12-19 1985-10-30 Nissan Motor Co., Ltd. Speaker for automotive vehicle audio system
JPS588000A (en) * 1981-07-06 1983-01-17 Murata Mfg Co Ltd Piezoelectric speaker
CH645227A5 (en) * 1981-12-22 1984-09-14 Multiphonie Sa electro-acoustic transducer.
US5025474A (en) * 1987-09-29 1991-06-18 Matsushita Electric Industrial Co., Ltd. Speaker system with image projection screen
CA1338084C (en) * 1988-06-09 1996-02-27 Akira Okaya Multidimensional stereophonic sound reproduction system
DE69106712D1 (en) * 1990-08-04 1995-02-23 Secr Defence Brit A panel speakers.
JP3097065B2 (en) * 1991-04-23 2000-10-10 セイコーエプソン株式会社 Information processing equipment
DE4121686A1 (en) * 1991-06-29 1993-01-07 Nokia Deutschland Gmbh A method for gluing the schwingspulentraegers with the diaphragm of a loudspeaker
US5349575A (en) * 1992-05-19 1994-09-20 Goldstar Co., Ltd. Portable audio device
US5828768A (en) * 1994-05-11 1998-10-27 Noise Cancellation Technologies, Inc. Multimedia personal computer with active noise reduction and piezo speakers

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AU702863C (en) 2005-09-22
IL123489D0 (en) 1998-09-24
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DE69605123D1 (en) 1999-12-16
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CA2229998A1 (en) 1997-03-13
AU6880596A (en) 1997-03-27
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CN1198480C (en) 2005-04-20

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