EP1506691B1 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
EP1506691B1
EP1506691B1 EP03792319A EP03792319A EP1506691B1 EP 1506691 B1 EP1506691 B1 EP 1506691B1 EP 03792319 A EP03792319 A EP 03792319A EP 03792319 A EP03792319 A EP 03792319A EP 1506691 B1 EP1506691 B1 EP 1506691B1
Authority
EP
European Patent Office
Prior art keywords
diaphragm
excitation
loudspeaker
excitation means
attached
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP03792319A
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German (de)
English (en)
Other versions
EP1506691A2 (fr
Inventor
Daniel Beer
Berthold Schlenker
Sandra Brix
Thomas Sporer
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
Original Assignee
Fraunhofer Gesellschaft zur Forderung der Angewandten Forschung eV
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Publication of EP1506691A2 publication Critical patent/EP1506691A2/fr
Application granted granted Critical
Publication of EP1506691B1 publication Critical patent/EP1506691B1/fr
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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R17/00—Piezoelectric transducers; Electrostrictive transducers
    • 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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/07—Loudspeakers using bending wave resonance and pistonic motion to generate sound
    • 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 speakers and in particular on flat speakers or flat-sound transducers.
  • the goal is to construct speakers so that they themselves can be integrated into other appliances or furniture so that distribute the same unobtrusively in the room in this way to let. For example, there are already speakers that at the same time as a picture frame, as a screen or even act as a cabinet door.
  • the principle of this principle function mechanism consists in that one to the electrodynamic excitation system applied electrical signal into an audio-frequency mechanical Vibration is converted.
  • This mechanical Vibration is at an excitation point, at which the pathogen system abuts the membrane or attached to the same is transferred to the serving as a membrane plate, whereby structure-borne noise is generated in the plate.
  • the structure-borne sound component which is determined by bending waves spread in the membrane, ensures the production of airborne sound.
  • the generation of Airborne noise therefore takes place via the detour of structure-borne noise.
  • the longitudinal mechanical oscillations of the Oscillation pulses of the pathogen system are not as in Cone speakers taken from the diaphragm and immediately in Airborne sound implemented, but it will initially be structure-borne noise produced in the membrane, the - and in particular the bending shaft portion same - then the surrounding air to longitudinal waves or pressure waves, i. Sound, stimulates.
  • the Transformation of structure-borne sound plays like this a filter in the signal chain. The result is that only one person Signal component of the signal to be reproduced as airborne sound is reproduced in the plate as structure-borne sound spread out and then radiated into the room can.
  • DE 19541197 A1 describes a cone loudspeaker with an electrodynamic vibration system, a cone-shaped Membrane, a bead and a basket on which the membrane is hung over the bead.
  • the membrane When applying a sound signal to the vibration system, the membrane performs a Lifting movement along the center line.
  • the membrane is with a layer of a piezoelectric material provided which is also connected to the sound source and while undergoing expansion changes.
  • the layer acts as a thickness oscillator or bending vibrator.
  • DE19960082A1 describes a loudspeaker with a Plate diaphragm attached to its back by a vibration drive is operated.
  • the plate membrane performs at the oscillation a lifting movement.
  • the object of the present invention is to provide a To create speakers that are better at fixed size Playback quality or a fixed playback quality more compact design allows.
  • a loudspeaker comprises a membrane, a first excitation device for the excitation of structure-borne noise in the membrane and a second, different from the first, Excitation device for displacing the membrane in a longitudinal oscillatory motion in the direction perpendicular for membrane expansion.
  • the problem of low bass reproduction on the one hand and invisible integration on the other solved that introduced a second pathogen system which is the membrane or serving as a membrane Plate in addition to the bending vibrations of structure-borne noise uniformly moved back and forth.
  • the sound reproduction is thereby over the entire hearing frequency range possible without the goal of invisible integration or installation is hampered.
  • a broadband playback means a compact speaker can be obtained that of a membrane and associated exciter consists of two different to excite the membrane Excitation devices are used, which are the membrane vibrate in different ways and responsible for different frequency bands or frequency ranges are.
  • the one, already known arousal device for generating structure-borne noise in the membrane is according to the invention only for the reproduction of the high and Mittelton Anlagenes responsible and their task is only in it, as many bending waves in the membrane to stimulate.
  • the previously missing low frequency range takes over the exciting device added according to the invention, the the membrane to longitudinal forward and backward swinging movements stimulates with a big stroke.
  • the structure-borne sound excitation device becomes the membrane from the inventively introduced second excitation device excited to longitudinal vibrations, thereby The membrane thus oscillates in the form of bending waves and in addition as a whole uniformly back and forth emotional.
  • the deflection of the second exciter can far be greater than the bending waves of the structure-borne sound generating device. Because the diaphragm is a relatively large fictitious Membrane surface possesses, by the uniform Moving the plate back and forth moves a lot of air volume. In this way, the generation of sufficient sound level in the low frequency range much better possible than with the Bending shaft principle, in which the diaphragm deflections also can be smaller.
  • An advantage of the present invention is again in that by the combination of both types of excitation, i.e. structure-borne sound generation and the longitudinal and backward motion, on a membrane one clearly better reproduction of the entire hearing frequency range is possible.
  • the membrane surface may contribute Consistent playback quality are reduced.
  • Another advantage of the present invention is in that by the fact that the longitudinal oscillatory motion a lot of air volume moves, the bass reflex principle is effective can be used, which in previous flat speakers after Flexural wave principle to no improvement of the bass tone generation led.
  • Another advantage of the present invention is in that, since the reproduction in the low-frequency range by the Generation of forward and backward oscillations of the membrane is taken over, the structure-borne noise generating device even after the piezoelectric principle can work, what so far when using only the structure-borne noise generation due to the very narrow frequency range for which the piezoelectric principle is suitable, only with losses the bandwidth was possible.
  • the membrane thus becomes a significant improvement achieved in the sound reproduction, so that the structure-borne sound generating device after the piezoelectric Principle can work.
  • the speaker generally indicated at 10, consists essentially from a serving as a membrane plate 12, a Structure-borne noise generating device 14, a longitudinal vibration excitation device 16 and an excitation signal generating means 18th
  • the structure-borne sound generating device 14 operates according to the electrodynamic principle and is more detailed in Fig. 1a shown in cross section.
  • the structure-borne sound generating device 14 includes an annular permanent magnet 20, which is polarized along its axis of rotation, a centered or coaxial with the annular permanent magnet 20 arranged cylindrical pole core 22 and a in an annular air gap between pole core 22 and permanent magnet 20 extending voice coil 24.
  • the structure-borne sound generating device formed as an electrodynamic drive 14, for example, disk or annular pole plates.
  • an electrodynamic drive 14 for example, disk or annular pole plates.
  • one is Another structure of the electric motor drive also possible.
  • the thus formed Structure-borne sound generating device 14 is on the Voice coil 22 containing part centered on the plate 12 attached. As it is described below, is the opposite case, however, also conceivable. Otherwise is the structure-borne noise generating device not fixed or unlicensed, i. the other from components 20 and 22 existing part, is freely movable.
  • the membrane 12 is exemplified as perpendicular Membrane 12 has been described, to which a coil 24 attached is that in an annular air gap between a cylindrical Polkern 22 and an annular permanent magnet 20th immersed, wherein Polkern 22 and permanent magnet 20 a Form unit, which is guided via the voice coil 24 to opposite the same in the direction perpendicular to the expansion direction the diaphragm 12 to be displaced.
  • the vertical For example, membrane is part of a wall. In this vertical Alignment acts on the non-retained part 20, 22 of the drive 14 no force in the direction of the surface normals of the Membrane 12 has, i. in the direction in which this part is relative to the voice coil 24 is displaceable, but only the downward weight.
  • this part naturally has a certain inertia, so that the excitation device 14, which is provided for, To produce structure-borne noise in the membrane 12; so mechanical Waves in the lattice of the membrane 12, which spread in it, high frequency is excited, and that with sufficient inertia or sufficient weight of the freely movable part 20, 22 of the Drive compared to the inertia or the weight of the membrane 12 this part will essentially not leave its position, but rather only the voice coil 24 together with the membrane 12 is moved back and forth within the air gap and while still keeping the floating part 20, 22 from to be pulled down by gravity.
  • the longitudinal vibration excitation device 16 caused stroke to be considered to pull out the coil out of due to the inertia of the freely movable Partly quasi-stop gap to prevent. This can be done, for example, by appropriate length of the overlap from coil 24 and air gap done.
  • a elastic connection of the two slidably slidable against each other Parts of the drive 14 may be provided, so that the freely moving part in case of vibrations together with the membrane and the part attached to the same is moved, and by higher-frequency relative movements to the attached part still structure-borne noise generated in the membrane.
  • a speaker of the type shown in be attached to another position, such as on the ceiling.
  • additional measures should be taken to that the moving parts of the drive 14 with each other coupled, such as e.g. in addition to the mechanical air-gap voice coil guide via an elastic connection, so that the two moving parts of the drive 14th alone already form an oscillatory system and one Sliding down the freely movable part of the drive 14th is prevented from passing through the coil 24.
  • the electrodynamic drive 14 converts an electrical Excitation signal flowing through the voice coil 24, after the electrodynamic principle in a mechanical relative motion between the two parts, the at the Plate 12 attached and free to move.
  • the freely movable part advantageously has enough Inertia, to the mechanical relative vibration movement effectively to transfer to the plate 12, whereby in the Plate 12 structure-borne noise and in particular bending waves generated be as exaggerated in Fig. 1a.
  • the Excitation signal flowing through the voice coil 24, receives it from the excitation signal generator 18, the same turn from an electrical sound signal generates the information to be reproduced displayed in a suitable manner.
  • the longitudinal vibration exciter 16 also works according to the electrodynamic principle and is shown in Fig. 1b shown in cross section.
  • the longitudinal vibration excitation device 16 is coaxial with the structure-borne sound generating device 14 arranged.
  • the electrodynamic Drive of the longitudinal vibration excitation device 16 also includes a permanent magnet 30, a pole core 32 and a voice coil 34.
  • the voice coil 34 receives her electrical excitation signal also from the excitation signal generating means 18, the same of the same the information to be displayed indicating sound signal generated.
  • the part surrounding the voice coil 34 touches the plate 12 - or is connected to the same - via a Adapter 36.
  • the voice coil 34 firmly connected to the adapter 36, extending from the Voice coil 34 extends from in the direction of the plate 12 and it expands radially to the plate 12 at rest of the speaker 10 along an annular excitation region either with a certain diameter or attached, such as glued to be, and around with the plate 12, the structure-borne sound generating device 14 to surround.
  • the adapter 36 consists of a cylinder jacket 38 with a diameter that is one tenth of the Extending the plate 12 at the narrowest point, and webs 40 extending radially and connect the cylinder jacket 38 to the voice coil 34, such that the cylinder jacket 38 is coaxial with an excitation point is aligned, on which the mechanical Vibration of the structure-borne sound generating device 14 on the Plate 12 is exercised.
  • the adapter 36 need not, as shown in Fig. 1a-1d, a circular cross-section or a circular excitation region have and be formed as a ring adapter, but may for example be formed rectangular.
  • the extent of the excitation range is, for example between one-tenth and new tenths of the extent the plate 12 in the respective direction of expansion of the Plate 12.
  • the adapter 36 allows the mechanical Oscillation of the drive 16 to a longitudinal oscillatory motion the plate 12 almost in the whole, so translational, leads, as will be explained in the following.
  • the adapter 36 Along the bearing surface of the adapter 36 supports be arranged by the adapter 36 in the direction of Project plate 12, so that the adapter 36 only on isolated Support points, i. the ends of the columns, on the Plate 12 rests or is fixed there. This can the influence of the adapter 36 and the longitudinal vibration excitation device 16 on the generated structure-borne noise be further reduced without significantly the uniformity the drive of the longitudinal vibration excitation device 16 impair.
  • the speaker 10 comprises the two devices 14 and 16. Both institutions 14 and 16 take over the Play the information to be played back for different Frequency ranges or frequency bands.
  • the structure-borne sound generating device 14 is for playback the high and midrange areas, while the Longitudinal vibration excitation device 16 for the Low-frequency range is responsible.
  • the frequency range of the excitation signal for the structure-borne noise generating device 14 extends for example, from 100 Hz to 25 kHz and preferably from 150Hz to 20kHz, while the frequency range of the excitation signal for the longitudinal vibration excitation device 16, for example, from 10Hz to 2kHz and preferably from 20Hz to 200Hz.
  • the excitation signal generating device 18 for example, as a crossover be executed.
  • the frequency range for structure-borne sound generation a frequency higher than all of the frequency range included to the longitudinal vibration excitation Frequencies, or the frequency ranges include a first Frequency at which the excitation signal for structure-borne sound generation is higher than the other excitation signal, and one second, to the first lower frequency at which the excitation signal for longitudinal vibration excitation equal to the other excitation signal or higher than the same.
  • the generated by the excitation signal through the voice coil 24 mechanical oscillations lead in the Plate 12 to structure-borne noise in the plate 12 and in particular to bending waves, in turn, at the interface air-plate be converted to airborne sound.
  • the structure-borne sound generating device 14 has this advantageously a sufficient moment of inertia.
  • the longitudinal vibration excitation device 16 offset the plate 12 in longitudinal oscillatory movements 42 with a hub which is significantly larger, e.g. more than 20 times greater than the amplitude of the structure-borne noise generating device 14, e.g. 20mm.
  • This longitudinal Back and forth movement 42 of the plate 12 leads directly to longitudinal airborne sound waves or pressure waves 44 in Low frequencies.
  • the voice coil 34 is no longer vertical in the field of the air gap can dip and thus distortions arise is the longitudinal vibration excitation device 16 with the magnet 30 and the pole core 32nd fixed part of the drive, such as. at a Back wall.
  • the adapter 36 serves to mechanical Oscillation movement of the voice coil 34 so on the Distributed plate 12 to transfer that the plate 12 in im essential translational oscillatory movements in Direction perpendicular to an extension direction of the plate 12 is excited, i. the plate as possible in whole before and swing back.
  • the plate 12 thus vibrates in itself in the form of bending waves, as shown in Fig. 1a, and in addition, as a whole, uniform back and forth as it is shown by the double arrow 42 in Fig. 1b.
  • the plate 12 only via a firm connection through the adapter 36 with the voice coil 34 comprehensive part of the drive of the longitudinal vibration excitation device 16 and the leadership of this Partly in which the permanent magnet 30 and the pole core 32nd comprehensive part, such as when attaching the Loudspeaker hanging down on the ceiling, it is preferred if in addition a holder for the Plate 12 is provided, as in the following embodiments the case is.
  • the translational longitudinal vibration movement 42 the plate 12 only via the electrodynamic drive it is preferred that the plate 12 be such is suspended or stored oscillatory that at a longitudinal translation of the plate 12 from a rest position the same in the direction perpendicular to the plate extension a force caused by the suspension of this translational Deflection counteracts the membrane in the rest position return.
  • suspension and plate 12 an oscillatory system in which the plate 12 is capable of translationally moving in the direction perpendicular to the expansion direction to move back and forth.
  • This vibration system should be designed for a natural frequency be close to the bass range, for the longitudinal vibration excitation device 16 is responsible for exploiting the resonance overshoot.
  • Fig. 2a and 2b show an embodiment of a Speakers in which as the only differences to the Embodiment of Fig. 1a-1d, the longitudinal vibration excitation device from four electrodynamically working Drives 16a, 16b, 16c and 16d, and as Membrane serving plate 12 via a spider 50 on a Frame 52 is suspended, which in turn on a rear wall 54 is attached, which in turn also the the Permanent magnet 30 and the coil core 32 comprising part the electrodynamically operating drives 16a-d attached is.
  • the spider 50 is attached along the circumference elastic bands 56, e.g. Rubber bands, which themselves from their attachment ends on the circumference of the plate 12 in the essentially star-shaped from the center of the plate 12 to Extend the outside to point the way to the other end of the Frame 52 to be attached.
  • the bands 56 are relative to their attachment and spring constants designed so that each edge piece is equally affected.
  • the serving as a membrane Plate 12 and the drives 16a-16d are assembled Preferably adjusted so that none the direction of movement of the other. In this way, the membrane or plate mass and the mass of the longitudinal vibration excitation device 16 no influence the direction of vibration of the excitation coils 34 of the drives 16a-16d.
  • the spider 50 takes over the function of a bead, which dampens the membrane or plate 12 after each deflection and returns to the starting position or rest position.
  • the Rear wall 54 may serve as part of a speaker enclosure. However, the provision of a speaker enclosure is not mandatory.
  • an embodiment for a speaker that is different from the speaker 2a-2b differs by another suspension, but also a translational longitudinal Oscillation of the membrane serving as a plate 12 forward and back to a rest position allows.
  • the diaphragm 12 is resilient on each one axis 60 per corner of the rectangular, serving as a diaphragm Plate 12 stored.
  • the axes 60 are fixed to the Rear wall 54 attached to which also the drives 16a-16d are attached, wherein the axes 60 perpendicular from the parallel protrude to the plate 12 extending rear wall 54, i.e. in the direction of that caused by the drives 16a-16d translational longitudinal vibration direction extend.
  • the storage of the plate 12 at each corner is for example, by a corresponding hole on each corner realized, through which the respective axis 60 extends.
  • a resilient mounting of the plate 12 at each corner on the axes 60 is through, for example, coil springs 62nd achieved, which surround the axes 60, led by the same be and attached to the respective corner of the plate 12 End and a fixed, for example, with the back wall 54 connected end, have.
  • Any other elastic means can be used to define a potential minimum for the respective corner.
  • the assembly is again preferably carried out such that the diaphragm 12 and the drives 16a-16d do not affect each other's directions of movement.
  • the rear wall 54 can be part of it a speaker housing serve. Membrane mass and mass of the longitudinal vibration exciter 16a-d less influence on the vibration direction of the voice coils 34 of the actuators 16a-16d, i. they dive like they do not installed state in the respective air gap.
  • the Springs take on the function of the bead, which is the membrane 12 after each deflection dampens and in the starting position returns.
  • Figs. 1a-1d is the part of the drives that surrounds the voice coil the longitudinal vibration excitation device with the Plate 12 either be firmly connected or at the same only present. In both cases it is preferred that when assembling the loudspeaker according to Fig. 2a, 2b and 3 of Distance between the membrane plate 12 and the drives 16a-16d set in the rest position of the membrane plate 12 such that they are touching, but at rest they do not exert any forces on each other. In order to the membrane plate better suits the movements of drives 16a-16d can follow, which is the voice coil 22 and 34 comprehensive Part of the same preferably with the plate 12, for example bonded.
  • FIG. 4 shows an embodiment of a loudspeaker, in which, in contrast to the speaker of FIG. 3 the longitudinal excitation device forming drives 16a-16d not over the voice coil 34 comprehensive Part, such as via a vibration coil carrier on the Membrane plate 12 are attached but over the permanent magnet 30 comprehensive part of the electrodynamic excitation system.
  • the voice coil 34 is on the back of the speaker 54 and not attached to the membrane plate 12. For the vertical immersion of the voice coil 34 in the air gap between the permanent magnet 30 and pole core 32nd continues to provide the suspension, i. the axes 60 with the Springs 62 and the spider 50th
  • FIG. 5 shows an embodiment of a loudspeaker, in which, as in the previous embodiments, both exciters 14 and 16 after the electrodynamic Working principle, however, the electrodynamic Drive of the longitudinal vibration excitation device 16 as a magnet, the permanent magnet of the structure-borne noise generating device 14 used.
  • suspension and structure-borne sound generating device 14 corresponds the embodiment of Fig. 5 that of Fig. 3rd and 4.
  • voice coil 70 which is attached to the rear wall 54 is. Both voice coils 24 and 70 act with the same Permanent magnet 20 together.
  • the voice coil 70 thus surrounds the structure-borne noise generating device 14.
  • the Voice coil 70 comprehensive part of the drive of the longitudinal vibration excitation device 16 fixed while the other part is attached to the membrane plate 12, present namely the permanent magnet 20 of the structure-borne noise generating device 14.
  • the drive of the structure-borne sound generating device 14, however, is only on the plate 12th fastened, namely with the vibration coil 24 comprehensive Part.
  • Fig. 6 shows an embodiment for a special attachment the structure-borne sound generating device 14 at the as a membrane serving plate 12.
  • a voice coil bobbin 80 is provided, which carries the voice coil 24 and on which the membrane plate 12 facing side a conical part having the cone tip connected to the membrane 12 is. This is an optimal point excitation as Membrane serving plate 12 to bending waves and a higher upper limit frequency of the structure-borne noise generating device achieved.
  • a speaker according to the invention with housing, in which the serving as a membrane plate via a airtight suspension is suspended on the housing to Completing the housing airtight.
  • a special bead may be used, e.g. a continuous, between the circumference of the plate 12 and the scope of a corresponding recess of the speaker strained elastic band.
  • the thickness can be even more by the spring-axle suspension of FIG. 3 or by the spider suspension according to Fig. 2a and 2b are supported. Because of the longitudinal translational movement of the Entire membrane is moved sufficiently air volume can In addition, the bass reflex principle can be used. To becomes a hole for the reflection channel, for example laterally, incorporated into the housing.
  • FIG. 1a - Fig. 6 can be combined with each other, both in terms on the suspension, the positions of the drives as well the attachment of the relatively movable parts of the Drives.
  • Fig. 2a-5 pointed out that instead of the elastic or oscillatory suspension of the membrane plate by the above-described elastic means, i. the elastic bands 56 and the springs 62, also a elastic suspension or attachment of the drives of Longitudinal vibration excitation device may be provided could, while the membrane plate, however, only by the axes 60 is guided or free.
  • drives on one other transducer principle than the electrodynamic principle based could be described, drives on one other transducer principle than the electrodynamic principle based.
  • drives on one other transducer principle than the electrodynamic principle based could also be considered after the piezoelectric Principle be executed working, such. as a Piezo crystal connected to the membrane on one side is and on the other hand connected with a weight and otherwise free to move.
  • the structure-borne noise generating device not firmly connected to the membrane, but that they for example, by a suitable device from above hanging at a fixed height, but otherwise in longitudinal Vibration direction of the vertically aligned Membrane is held freely movable to rest at the Membrane to abut.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Liquid Crystal (AREA)
  • Surgical Instruments (AREA)

Claims (19)

  1. Haut-parleur avec
       une membrane (12) ;
       un premier dispositif d'activation (14), destiné à générer du bruit de structure dans la membrane (12) ; et
       un deuxième dispositif d'activation (16), différent du premier, destiné à déplacer la membrane (12) selon un mouvement d'oscillation longitudinal (42) dans une direction perpendiculaire à l'extension de la membrane, le deuxième dispositif d'activation (16) présentant un entraínement électrodynamique présentant une première partie comportant une bobine mobile (34) et une deuxième partie comportant un aimant (30), soit la première partie, soit la deuxième partie étant fixée de manière stationnaire, tandis que l'autre partie est fixée à la membrane (12) ou entre en contact avec celle-ci.
  2. Haut-parleur selon la revendication 1, dans lequel le premier dispositif d'activation (14) est réalisé de manière à fonctionner selon le principe électrodynamique ou le principe piézoélectrique.
  3. Haut-parleur selon la revendication 1 ou 2, présentant, par ailleurs, la caractéristique suivante :
    un dispositif (18) destiné à générer un premier signal électrique d'activation avec une première plage de fréquences et un deuxième signal électrique d'activation avec une deuxième plage de fréquences à partir d'un signal électrique indiquant des informations à reproduire, la première plage de fréquences comprenant une fréquence qui est supérieure à toutes les fréquences comprises dans la deuxième plage de fréquences, ou la première et la deuxième plage de fréquences comprenant une première fréquence à laquelle le premier signal d'activation est supérieur au deuxième signal d'activation, et une deuxième fréquence, inférieure à la première, à laquelle le deuxième signal d'activation est égal au premier signal d'activation ou supérieur au premier signal d'activation.
  4. Haut-parleur selon l'une des revendications 1 à 3, dans lequel le premier dispositif d'activation (14) est fixé à la membrane (12) et, pour le reste, non supporté.
  5. Haut-parleur selon l'une des revendications 1 à 4, dans lequel l'entraínement électrodynamique du deuxième dispositif d'activation (16) est fixé de manière stationnaire à une distance de la membrane (12) telle que, dans un état de repos, le deuxième dispositif d'activation (16) et la membrane (12) n'exercent pas de forces l'un sur l'autre.
  6. Haut-parleur selon l'une des revendications 1 à 5, dans lequel le deuxième dispositif d'activation (16) est fixé à la membrane (12).
  7. Haut-parleur selon l'une des revendications 1 à 6, dans lequel le deuxième dispositif d'activation (16) est réalisé de manière à activer la membrane (12) dans une zone étendue cohérente le long de la membrane (12).
  8. Haut-parleur selon l'une des revendications 1 à 6, dans lequel le deuxième dispositif d'activation (16) est réalisé de manière à activer la membrane (12) en une pluralité de points d'activation le long de la membrane (12).
  9. Haut-parleur selon l'une des revendications 1 à 8, dans lequel le deuxième dispositif d'activation est réalisé de manière à activer la membrane de manière uniforme.
  10. Haut-parleur selon la revendication 7 ou 8, dans lequel la zone étendue cohérente ou la pluralité de points d'activation sont disposés de manière symétrique au centre par rapport à la membrane (12).
  11. Haut-parleur selon l'une des revendications 1 à 10, dans lequel la partie assemblée ou couplée avec la membrane (12) est fixée à la membrane (12) ou entre en contact avec cette dernière, par l'intermédiaire d'un adaptateur qui s'appuie, par l'intermédiaire de supports distants l'un de l'autre, sur la membrane (12) ou est fixé à la membrane (12).
  12. Haut-parleur selon l'une des revendications 1 à 11, dans lequel la partie comportant la bobine d'oscillation (34) est fixée à la membrane (12) ou entre en contact avec cette dernière, par l'intermédiaire d'un adaptateur (36), de sorte qu'une oscillation de la bobine mobile (34) le long d'une zone d'activation annulaire soit transmise à la membrane (12).
  13. Haut-parleur selon l'une des revendications 1 à 12, dans lequel le deuxième dispositif d'activation (16) présente plusieurs unités d'activation (16a à 16d) qui sont actionnées par les mêmes signaux d'activation.
  14. Haut-parleur selon l'une des revendications 1 à 13, présentant, par ailleurs, la caractéristique suivante :
    une suspension (50, 60, 62) destinée au montage apte à osciller de la membrane (12), de sorte qu'elle permette une translation longitudinale de la membrane (12), à partir d'une position de repos de celle-ci dans une direction perpendiculaire à l'extension de la membrane et qu'elle soit active lors de la translation de la membrane (12) depuis la position de repos, pour contrecarrer la translation.
  15. Haut-parleur selon l'une des revendications 1 à 14, présentant, par ailleurs, la caractéristique suivante :
    un support (50), au moyen duquel est suspendue la membrane (12).
  16. Haut-parleur selon l'une des revendications 1 à 15, dans lequel la membrane (12) est montée sur le pourtour par des axes (60) s'étendant perpendiculairement à l'extension de la membrane, afin d'être mobile dans la direction perpendiculaire à l'extension de la membrane, à chaque axe (60) étant prévu un dispositif de ressort (62) fixé, par l'une de ses extrémités, au pourtour de la membrane (12), tandis que l'autre extrémité est fixée de manière stationnaire.
  17. Haut-parleur selon l'une des revendications 1 à 16, dans lequel le premier et le deuxième dispositif d'activation (14, 16) sont réalisés de manière à fonctionner de manière électrodynamique, le premier dispositif d'activation (14) présentant une première bobine mobile (24) et un aimant permanent (20) et étant fixé à la membrane (12), et le deuxième dispositif d'activation (16) présentant une deuxième bobine mobile (70) entourant le premier dispositif d'activation (14), pour coopérer avec le premier aimant permanent (20).
  18. Haut-parleur selon l'une des revendications 1 à 17, dans lequel le premier dispositif d'activation (14) présente une partie conique qui est mobile par rapport à une autre partie non supportée du premier dispositif d'activation (14), et dont la pointe de cône est fixée à la membrane (12) et définit un point d'activation auquel une oscillation mécanique du premier dispositif d'activation (14) est transmise à la membrane (12).
  19. Haut-parleur selon l'une des revendications 1 à 18, présentant, par ailleurs, une paroi arrière (54) à laquelle est suspendue la membrane (12) de sorte qu'elle puisse se déplacer en translation dans une direction perpendiculaire à l'extension de membrane, et à laquelle est fixée le deuxième dispositif d'activation (16), et qui forme, ensemble avec la membrane, un boítier de réflexion de basses.
EP03792319A 2002-08-16 2003-08-14 Haut-parleur Expired - Lifetime EP1506691B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10238325A DE10238325A1 (de) 2002-08-16 2002-08-16 Lautsprecher
DE10238325 2002-08-16
PCT/EP2003/009036 WO2004019652A2 (fr) 2002-08-16 2003-08-14 Haut-parleur

Publications (2)

Publication Number Publication Date
EP1506691A2 EP1506691A2 (fr) 2005-02-16
EP1506691B1 true EP1506691B1 (fr) 2005-11-02

Family

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EP03792319A Expired - Lifetime EP1506691B1 (fr) 2002-08-16 2003-08-14 Haut-parleur

Country Status (7)

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US (1) US7391879B2 (fr)
EP (1) EP1506691B1 (fr)
JP (1) JP4007453B2 (fr)
AT (1) ATE308867T1 (fr)
DE (2) DE10238325A1 (fr)
HK (1) HK1074963A1 (fr)
WO (1) WO2004019652A2 (fr)

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DE102005011747B3 (de) * 2005-03-11 2006-06-29 Benteler Automobiltechnik Gmbh Aktiver Abgasschalldämpfer
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EP1876419B1 (fr) * 2006-07-03 2008-10-15 Continental Automotive GmbH Dispositif de navigation étanche
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JP4506859B2 (ja) 2008-03-14 2010-07-21 ソニー株式会社 音声出力装置
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Also Published As

Publication number Publication date
US20050157905A1 (en) 2005-07-21
HK1074963A1 (en) 2005-11-25
US7391879B2 (en) 2008-06-24
ATE308867T1 (de) 2005-11-15
EP1506691A2 (fr) 2005-02-16
DE10238325A1 (de) 2004-03-11
JP2006500803A (ja) 2006-01-05
WO2004019652A2 (fr) 2004-03-04
JP4007453B2 (ja) 2007-11-14
WO2004019652A3 (fr) 2004-04-08
DE50301564D1 (de) 2005-12-08

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