WO2015004526A2 - Variable vorrichtung zum ausrichten von schallwellenfronten - Google Patents
Variable vorrichtung zum ausrichten von schallwellenfronten Download PDFInfo
- Publication number
- WO2015004526A2 WO2015004526A2 PCT/IB2014/001805 IB2014001805W WO2015004526A2 WO 2015004526 A2 WO2015004526 A2 WO 2015004526A2 IB 2014001805 W IB2014001805 W IB 2014001805W WO 2015004526 A2 WO2015004526 A2 WO 2015004526A2
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- sound
- individual
- transducers
- wavefront
- variable device
- Prior art date
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
- H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
- H04R1/026—Supports for loudspeaker casings
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R1/00—Details of transducers, loudspeakers or microphones
- H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
- H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
- H04R1/34—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means
- H04R1/36—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by using a single transducer with sound reflecting, diffracting, directing or guiding means by using a single aperture of dimensions not greater than the shortest operating wavelength
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/02—Details casings, cabinets or mounting therein for transducers covered by H04R1/02 but not provided for in any of its subgroups
- H04R2201/025—Transducer mountings or cabinet supports enabling variable orientation of transducer of cabinet
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
- H04R2201/401—2D or 3D arrays of transducers
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2201/00—Details of transducers, loudspeakers or microphones covered by H04R1/00 but not provided for in any of its subgroups
- H04R2201/40—Details of arrangements for obtaining desired directional characteristic by combining a number of identical transducers covered by H04R1/40 but not provided for in any of its subgroups
- H04R2201/405—Non-uniform arrays of transducers or a plurality of uniform arrays with different transducer spacing
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R27/00—Public address systems
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04S—STEREOPHONIC SYSTEMS
- H04S2420/00—Techniques used stereophonic systems covered by H04S but not provided for in its groups
- H04S2420/13—Application of wave-field synthesis in stereophonic audio systems
Definitions
- the present invention relates to a variable device having a plurality of sound transducers for aligning sound wavefronts and a method for aligning the sound transducers.
- Point-shaped sound sources radiate evenly in all directions. Often, however, it is essential to direct the radiation of transducers in a certain direction. This requires a spatial extension of the emitting system, which has at least half the length of the radiated wavefront.
- a widespread solution for directing the radiation is to install several sound transducers in a row as so-called sound lines. Placed vertically in the azimuth plane, they have the radiation characteristic of the individual sound transducer, but in the elevation plane a clear directivity is formed.
- the radiation characteristic of such a group of coherently controlled sound transducers can also be adapted to the given requirements.
- An example of this are the line arrays, usually as "banana” superimposed suspended single speakers, which in the far away audiences of
- a point sound source at the focal point of a parabolic mirror can thus generate a parallel wavefront, which carries the sound with approximately the same level over long distances.
- Such reflectors can also be curved so that the sound in a focus point (im
- Direct sound component becomes larger.
- the sound field can be confined to a dedicated area to less disturb adjacent areas.
- Airborne sound insulation does not decrease with distance. With concave wavefronts, the level of the signal in the focus point is even much higher than on the transducers themselves.
- a directional wavefront which arises from the superposition of the elementary waves, is to be aligned by the mechanical shaping of a variable device of sound transducers on the area of the listener.
- the individual elements of the device should be able to be assembled into a scalable overall size of the device and be reusable.
- the acoustic elementary waves of the individual elements should be able to be composed so that they are convex or concave
- a selected coverage area can be supplied with significantly more acoustic energy before the arrangement of sound transducers than the areas outside this area to be supplied.
- the sound power of the arrangement of sound transducers can be focused in one or more points.
- a variable device for aligning acoustic wavefronts is constructed, which is characterized in that the device consists of more than two individual housings with sound transducers, which can move against each other by means of a positive connection between the individual housings so that the acoustic centers of the individual Sound transducers can be aligned in two spatial axes on the shape of the wavefront to be generated, so that by the displacement of the housing against each other both concave and convex sound wave fronts can be generated even if all transducers are supplied from a common source with the same audio signal.
- the radiation of the arrangement of sound transducers can be aligned to the desired area.
- each individual transducer emits relatively uniformly in all Directions. Only the superimposition of the wavefronts gives the common wavefront their propagation direction. Therefore it is possible to simply offset the individual housings of the transducers in parallel.
- the elementary waves generated by the transducers of the array can be converted from the Huygens variable device into a closed wavefront
- variable device for aligning acoustic wavefronts brings with it an advantage.
- the adaptation of the transducers to the load resistance of the air improves significantly. Due to its low viscosity, the air can easily move aside the movements of a single membrane, while the sound transducer practically works almost completely empty at low signal frequencies. This mismatch results in the very low efficiency that individual transducers with low membrane diameters in the bass and fundamental range have.
- the close to each other arranged transducers of the variable device for superposition of acoustic elementary waves do not allow a dodge of the air, because adjacent transducers generate the same sound pressure at the same moment.
- the efficiency increases and the natural resonance of the transducer decreases by the mass of the upstream air column. Accordingly, the frequency response of the variable device for superposition of fundamental acoustic waves must be equalized depending on their overall size.
- variable device for aligning sound wavefronts can therefore, depending on their overall size, from the low pitch range to the upper limit of transmission of the individual, small Sound transducers generate the entire audio spectrum from a single point of origin in the center of the radius of curvature.
- variable device for aligning acoustic wavefronts over the entire transmission range ensures a very good
- Sound wave fronts is that the curvature of their surface can be determined by the position of the virtual starting point of the sound wave front. The further the center of the curvature is placed behind the radiator surface, the narrower the beam angle becomes.
- the direct wave which apparently originates from the virtual sound source, can in principle only be heard in the area in which it would be visible from the listener's position. This circumstance can be used to limit the radiation of the wavefront to a desired range.
- the virtual sound source that is in the center or starting point of the
- variable waveguide-aligning device arises, apart from the diffraction and aliasing effects that arise because of its finite size, only to be heard where it is arranged by the listener in the area of the variable acoustic wavefront alignment device.
- the feedback limit increases in a large, low-curvature variable acoustic wavefront alignment device compared to conventional ones Sound systems go very far when an artist appears with his microphone in the area in front of the sound transducers.
- the sound pressure immediately before the sound transducers is not much higher than in the audience area, while it increases very sharply in point sound sources corresponding to a 1 / r function immediately before the sound transducers.
- the difference between the two distance-dependent values is also the difference in the total
- Loop gain which determines the point of application of the acoustic feedback.
- Sound wave fronts is performed so broad that the listener remains in the coverage area.
- the alignment of the individual sound transducer to each other can be done in different ways.
- an arrangement can be determined in which the acoustic centers of the individual sound transducers have the same distance to a virtual sound source or to the desired focal point. From this templates can be made, in which the individual housings before their
- Locking be aligned in rows and columns.
- Focus points also have the ability to place a microphone in the focus point and to provide a reference speaker in the center of the variable waveguide fringe alignment device with a repeating short pulse. The same signal is then routed sequentially to each of the transducers to be aligned, and it is then shifted until the pulse edges in the oscillogram match.
- variable device If the set surface shape of the variable device is to be reused for alignment of acoustic wavefronts at other locations in the same configuration, it is not necessary to disassemble the entire device into each housing.
- the offset can be marked at the interfaces of transportable units. Then the positive connection is released only at these points and the resulting block is transported fully assembled to the next site.
- An essential advantage of the mechanical alignment of the sound transducers over the electronic solutions for controlling the directivity of loudspeaker groups is that not every sound transducer requires its own amplifier and complex signal processing for the control.
- the individual sound transducers can by suitable
- Combinations of series and parallel circuits are connected together so that they can be connected to a common commercial power amplifier.
- Sound wave fronts could thus be made simpler, especially since the supply voltage for the output stages could be provided from a common power supply.
- the desired shape of a wavefront can be formed. It may be convex, forming a directional radiation to the desired area or concave, forming a focus point, in which all the sound energy of the variable acoustic wavefront alignment device is collected.
- a positive connection between the individual housings can be advantageously carried out if they are made of profile material with a corresponding configuration of the outer walls. But any other type of positive connection is possible.
- variable device it may be necessary to greatly bend the front of the variable device for aligning sound wave fronts. If the individual housing of the variable
- the individual transducers are not deep enough to ensure a positive connection of the individual housing. Then it may be necessary to insert stabilizing elements between them. This can be, for example, short frames from the housing profile from which the individual housings are made.
- stabilizing elements can be, for example, short frames from the housing profile from which the individual housings are made.
- the variable device for superposition of acoustic elementary waves it is also possible to interleave two different curvatures of the emitter surface. Accordingly, the individual transducers are assigned in their cases alternately the different levels and supplied to the respective curvature associated signal.
- interleaved variable acoustic wavefront alignment devices are widely spaced apart, they may be correspondingly long
- variable device Another possibility for closing the gaps arising in such a case is to control groups of sound transducers within the variable device for aligning sound wavefronts with a time delay.
- the part of the variable device for aligning sound wavefronts with a time delay is to control groups of sound transducers within the variable device for aligning sound wavefronts with a time delay.
- the focusing of the signals even allows different signals to be sent to both ears of a listener at a given point.
- the resulting virtual headphone allows a good spatial
- Playback of individual content for example, even where the wearing of conventional headphones is excluded because of the associated hygienic problems, but a playback of the signal outside the desired spot is disturbing.
- the focus points of the sub-areas are spatially separated from each other, then different listeners can also be in the focal points. Then they can also be assigned different content. For example, in front of the screen of a presentation at fairs and exhibitions, points could be marked in which different languages can be heard. Again, the sound pressure level outside the focus points decreases rapidly.
- the Inner region can be easily realized from only slightly offset from each other transducers. If the total area of the device is large and the focal point is not far away from it, the displacements of the individual transducers to each other in the outer region of the arrangement become very large. It inevitably also creates a large construction depth of the arrangement, which may not be mechanically accommodated at the site.
- the outer transducers are interconnected in vertical columns and first supplied with the audio signal. The farther internal columns receive their signal delayed so far that it arrives at the same time as the signal of the outer column, which has a longer sound path to the listener. Finally, the inner, two-axis curved portion of the variable acoustic fringe alignment device is supplied with the audio signal.
- Sound wave fronts is arranged as a frame around an area for image reproduction. As long as the surface for the image display is made hard-hitting and the variable
- the spotlights profit at least with a +6 dB higher level in the bass and fundamental tone range.
- this application may require aligning the wavefronts not to a single point but to a vertically limited range. This is very easily possible by selecting a greater radius for the curvature of the variable device for aligning acoustic wavefronts in the vertical plane than for the curvature in the horizontal plane.
- Such a frame around a picture reproduction which can be adapted with its alignment to the conditions in the reproduction area, offers also in the home cinema range a solution to increase the direct sound portion of the center channel at the listener place. That raises the Direct sound component at the listener's seat.
- the speech intelligibility is therefore better and the disturbing reflections of an acoustically unfavorable designed playback room lose their influence.
- variable devices for aligning sound wave fronts are made wide enough, the home area also becomes an interesting field of application of the invention because of the high direct sound component, coupled with the good impulse response of the device and the extended sweet spot because of the distant virtual sound sources of a moderately curved arrangement become.
- variable waveguide alignment devices allow many applications of the variable waveguide alignment devices. At office workstations it is often very annoying when the sound unintentionally spreads throughout the room. From a large number of such individual signals often results in a high diffuse field sound level, which is distributed at each point of the room. Remedy offers then only the work under headphones.
- Shielding walls as they are also built between the workstations in call centers, could solve the problem if they are equipped with a variable device for
- the sound emitter In the audience area, the sound emitter is usually noisier than the actor himself. Accordingly, one perceives his voice above the stage or from the direction of the right or left loudspeaker, which considerably impairs the artistic impression of the performance.
- variable device for aligning sound wave fronts could also be arranged so that they radiate mutually forward and backward or left and right. Such a surface radiating to the left and right could easily be placed behind a stage backdrop without being seen by the spectators.
- the directional wavefronts of the lateral radiation could then be arranged by appropriately arranged stage elements in the spectator area are reflected.
- the technician traces the starting point of the phantom sound source created in the audience area to the position of the respective actor on the stage. Now that the direction of the acoustic waves of actor and electronic support is almost the same, but the first wave front emanates in all places from the actor himself, the audience will assign the entire sound to the actor himself and hardly perceive the electronic support.
- variable device for aligning sound wavefronts can be adapted to the geometric conditions of the venue so that the
- Fig. 1 illustrates an exemplary solution, as the sound transducer in a variable
- the closed housing (1) can be constructed, for example, of extruded profile.
- Bass reflex opening is provided, so may end only in the front, not in the rear wall.
- the profiles of the housing can be designed so that they can move in a positive connection (2) against each other.
- Fig. 2 shows a group of such closed casings (1) which have been aligned so that their centers are equidistant from a focus point (2). Therefore, the wave fronts of their elementary waves arrive there in the entire audible frequency range with the same phase angle. Only in this point, therefore, add the individual
- FIG. 3 shows a possible solution to a problem that can occur with small radii of curvature of the wavefront to be generated. Then, especially in the outer region of the variable device for aligning sound wavefronts, the displacements of the individual loudspeaker cabinets (1) against each other are so great that an immediate positive connection is no longer possible.
- the remedy is provided by an empty frame (2) screwed to the rear of the loudspeaker enclosure, from which the loudspeaker housing is made. It is open at its ends, so that the cable connections through it can be led to the sound transducer.
- the inner region (7) of the device for aligning sound wave fronts is mechanically adapted to the shape of the wavefront to be generated.
- the individual sound transducers would have to be moved very far apart in the sketched example in order to realize the radius of curvature to the focus point of the inner area.
- Remedy creates a delayed activation of individual speaker groups. The curvature of the arrangement is then continued only in one axis. In the other axis, the individual transducers are grouped together. In the example, all
- Sound transducer (1) driven by a common signal. With a time delay, columns (2) to (6) receive their signal. The inner group (7) is most delayed. The individual delays are chosen so that all signals arrive at the same time in the focus point (8).
- FIG. 5 shows a nested arrangement of two radii of curvature in one of the device for alignment of acoustic wavefronts. All transducers (1) with one dot focus their wavefront on the focus point (1). The sound transducers (4) shown without this point are aligned with the focus point (2) to the right. Both converter groups are controlled with separate signals. For example, the focus points can be heard in different languages.
- Fig. 6 shows such a nested arrangement around a screen (1).
- the transducers are again divided into groups (3) and (4), each group is supplied together with their signal.
- the radii of curvature of the groups are designed so that their focus points are near the ears of a listener (2).
- the group (3) then creates the left and the group (4) the right signal of a stereo reproduction that is clearly heard only in the given place.
- Fig. 7 illustrates a convexly curved device for aligning acoustic wavefronts radiating to two sides.
- the sound transducer groups (1) and (2) are interlaced again, but constructed with opposite orientation. Each group is driven by a common signal.
- the present invention of a variable device for aligning
- Sound wave fronts allow the transducers to be easily mounted and locked on a curved surface, allowing the shape of the wavefront to be made variable. Individual casings with sound transducers can be displaced relative to one another in such a way that a wavefront adapted to the respective requirements for the reproduction arises. This shape can be redesigned by re-mechanical shifting of the individual elements of the variable device.
- curved wavefronts can be generated from elementary waves.
- curved wavefronts can be generated, which seem to spring from a virtual sound source or cumulative in a focal point. Often it is sufficient to generate one or two virtual sound sources or focus points, so that the mechanical alignment the individual transducer is easier to implement than corresponding electronic solutions.
- a virtual source of sound is created in the center of the radius of curvature. If it is behind the device, a wavefront can be very well aligned with the listener area. A concave wavefront with a focal point is created when the center of curvature is placed in front of the transducer array.
- variable device for aligning sound wave fronts from more than two individual housings with sound transducers, which can move against each other by means of a positive connection between the individual housings so that the acoustic centers of the individual
- Sound transducers can be aligned in two spatial axes on the shape of the wavefront to be generated, so that by the displacement of the housing against each other both concave and convex sound wave fronts can be generated even if all transducers are supplied from a common source with the same audio signal.
- the curvature of its surface can be determined by the position of the virtual starting point of the sound wave front, which is in the center of the radius of curvature and can be used to determine the direction and opening angle of the radiated wavefront when it is positioned behind the device and in which the Add elemental waves of the individual transducers in phase, so that a focused sound source is formed when it is positioned in front of the device.
- the diameter of the individual sound transducers is chosen so that it remains small in the fundamental sound range of the audio signal with respect to the wavelength of the radiated audio signal. Therefore, it is not necessary to align the individual transducers to the listener.
- the individual transducers are connected as passive components by suitable combinations of series and parallel circuits so that they can be connected to a common commercial power amplifier or that the individual housing with a small, own power amplifier be equipped, the supply voltage for the power amplifiers from a
- the radii of curvature of the device are different in the azimuth and elevation planes in order to adapt the shape of a convex wavefront to the area to be supplied or to supply a preferred area with high sound energy instead of the focal point of a concave arrangement.
- a positive connection between the individual housings made of profile material with a corresponding configuration of the outer walls is performed, which can also be used to extend the individual housing to the rear, if the individual housing of the variable device are otherwise not deep enough to a ensure positive connection of the individual housing and allows the locking of the individual housing after alignment by a mechanical lock, which can be performed as an eccentric locking of the housing on its rear wall.
- two different curvatures of the radiator surface are interlaced by the housing are assigned alternately different levels that form either two different coverage areas or two spatially separated focus points in the same direction or in each opposite direction, which are supplied with different signal content can.
- the mechanical offset of the individual sound transducers to one another is determined in corresponding 3D CAD programs, in which the acoustic centers of the individual sound transducers have the same distance to a virtual sound source or to the desired focal point. Templates can be created from this graphic solution be aligned with the individual housings before being locked in rows and columns.
- the sound transducers can also after the result of a
- a device for aligning sound wave fronts has more than two individual housings, in each of which a sound transducer is arranged, wherein the individual housings can be displaced relative to each other by means of a positive (and typically releasable) connection between the individual housings the acoustic centers of the sound transducers can be aligned in two spatial axes on the shape of the sound wave front to be generated so that both concave and convex sound wavefronts can be generated by the device depending on the displacement of the housing to each other, if all sound transducers from a common source with the same Audio signal to be supplied.
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- Health & Medical Sciences (AREA)
- Otolaryngology (AREA)
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE112014003244.1T DE112014003244A5 (de) | 2013-07-12 | 2014-09-11 | Variable Vorrichtung zum Ausrichten von Schallwellenfronten |
US14/904,637 US20160157010A1 (en) | 2013-07-12 | 2014-09-11 | Variable device for directing sound wavefronts |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102013011696.1 | 2013-07-12 | ||
DE102013011696.1A DE102013011696A1 (de) | 2013-07-12 | 2013-07-12 | Variable Vorrichtung zur Ausrichtung von Schallwellenfronten |
Publications (2)
Publication Number | Publication Date |
---|---|
WO2015004526A2 true WO2015004526A2 (de) | 2015-01-15 |
WO2015004526A3 WO2015004526A3 (de) | 2015-04-09 |
Family
ID=51752145
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/IB2014/001805 WO2015004526A2 (de) | 2013-07-12 | 2014-09-11 | Variable vorrichtung zum ausrichten von schallwellenfronten |
Country Status (3)
Country | Link |
---|---|
US (1) | US20160157010A1 (de) |
DE (2) | DE102013011696A1 (de) |
WO (1) | WO2015004526A2 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023280982A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und vorrichtung zur beschallung mindestens eines publikumsbereiches |
WO2024099733A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen korrektur des frequenzganges von schallwellenfronten |
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JP6433748B2 (ja) * | 2014-10-15 | 2018-12-05 | 株式会社東芝 | 超音波発生装置 |
JP6786834B2 (ja) | 2016-03-23 | 2020-11-18 | ヤマハ株式会社 | 音響処理装置、プログラムおよび音響処理方法 |
FR3062233B1 (fr) * | 2017-01-24 | 2020-03-20 | L-Acoustics | Systeme de diffusion sonore |
DE102017107092B4 (de) * | 2017-04-03 | 2020-04-23 | K & F Beteiligungen Gmbh | Gerät |
KR101975022B1 (ko) * | 2018-03-07 | 2019-05-03 | 한국기계연구원 | 지향성 음향 장치 |
US11202144B2 (en) * | 2020-01-13 | 2021-12-14 | Brian Michael Coyle | Sound directing framework |
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DE10039740C1 (de) * | 2000-08-16 | 2001-12-06 | D & B Audiotechnik Ag | Lautsprecherboxenanordnung |
US7130430B2 (en) * | 2001-12-18 | 2006-10-31 | Milsap Jeffrey P | Phased array sound system |
US7415124B2 (en) * | 2004-03-15 | 2008-08-19 | Hpv Technologies Llc | Low frequency surface array |
CN101656908A (zh) * | 2008-08-19 | 2010-02-24 | 深圳华为通信技术有限公司 | 控制声音聚焦的方法、通讯设备及通讯系统 |
EP2309781A3 (de) * | 2009-09-23 | 2013-12-18 | Iosono GmbH | Vorrichtung und Verfahren zur Berechnung der Filterkoeffizienten für vordefinierte Lautsprecheranordnung |
US8249268B2 (en) * | 2010-01-26 | 2012-08-21 | Cheng Yih Jenq | Woofer-less and enclosure-less loudspeaker system |
WO2012094576A1 (en) * | 2011-01-06 | 2012-07-12 | Add-On Technology Co., Ltd. | Innovative sound system |
-
2013
- 2013-07-12 DE DE102013011696.1A patent/DE102013011696A1/de active Pending
-
2014
- 2014-09-11 US US14/904,637 patent/US20160157010A1/en not_active Abandoned
- 2014-09-11 WO PCT/IB2014/001805 patent/WO2015004526A2/de active Application Filing
- 2014-09-11 DE DE112014003244.1T patent/DE112014003244A5/de not_active Withdrawn
Non-Patent Citations (1)
Title |
---|
BERKHOUT, A.J.: "A Holographic Approach to Acoustic Control", J.AUDIO ENG.SOC., vol. 36, December 1988 (1988-12-01), pages 977 - 995 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2023280982A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und vorrichtung zur beschallung mindestens eines publikumsbereiches |
DE102021207302A1 (de) | 2021-07-09 | 2023-01-12 | Holoplot Gmbh | Verfahren und Vorrichtung zur Beschallung mindestens eines Publikumsbereiches |
WO2024099733A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen korrektur des frequenzganges von schallwellenfronten |
DE102022129642A1 (de) | 2022-11-09 | 2024-05-16 | Holoplot Gmbh | Verfahren zur richtungsabhängigen Korrektur des Frequenzganges von Schallwellenfronten |
Also Published As
Publication number | Publication date |
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US20160157010A1 (en) | 2016-06-02 |
WO2015004526A3 (de) | 2015-04-09 |
DE102013011696A1 (de) | 2015-01-15 |
DE112014003244A5 (de) | 2016-04-07 |
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