EP0083310B1 - Electro-acoustic transducer - Google Patents

Electro-acoustic transducer Download PDF

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Publication number
EP0083310B1
EP0083310B1 EP82810561A EP82810561A EP0083310B1 EP 0083310 B1 EP0083310 B1 EP 0083310B1 EP 82810561 A EP82810561 A EP 82810561A EP 82810561 A EP82810561 A EP 82810561A EP 0083310 B1 EP0083310 B1 EP 0083310B1
Authority
EP
European Patent Office
Prior art keywords
elastomer
oscillating element
piece
metal plate
frame
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
Application number
EP82810561A
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German (de)
French (fr)
Other versions
EP0083310A1 (en
Inventor
Marcel Fresard
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.)
Multiphonie SA
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Multiphonie SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Multiphonie SA filed Critical Multiphonie SA
Priority to AT82810561T priority Critical patent/ATE26055T1/en
Publication of EP0083310A1 publication Critical patent/EP0083310A1/en
Application granted granted Critical
Publication of EP0083310B1 publication Critical patent/EP0083310B1/en
Expired legal-status Critical Current

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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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H04R9/066—Loudspeakers using the principle of inertia

Definitions

  • Electroacoustic transducers comprising a magnetic carcass with an annular cylindrical air gap and an oscillating element carrying a coil immersed in this air gap, this oscillating element being shaped to allow its attachment to a panel to transmit sound vibrations to it, the carcass constituting a mass of inertia connected to the oscillating element by an elastic piece.
  • Transducers of this kind are described, for example, in US Pat. Nos. 3,524,027 and 3,728,497 and French No. 1,514,600.
  • British patent No. 1,447,588 shows an electromechanical transformer which can be produced from transducers a commercially available type for actuating loudspeakers and in which a base plate is connected elastically to a magnetic carcass by an annular elastomer ring.
  • the invention relates to a transducer of the aforementioned type in which the guidance of the coil in the air gap is excellent, which makes it possible to mount this transducer in any position.
  • the oscillating element is constituted by a metal plate carrying a non-ferromagnetic metal cylinder serving as support for the coil, this plate having holes to allow its fixing to said panel, the elastic part being of shape annular, made of elastomer, carried by said metal plate and surrounding the base of a bell-shaped part forming the casing of the carcass to connect it in leaktight manner to said plate and to ensure the centering of the coil in the air gap , the carcass being held axially against the elastomer part by a screw engaged in an axial thread of the central pole of the carcass, the head of this screw resting on a washer in turn resting on a rubber ring, the screw , the washer and the ring being all arranged inside a recess provided in the central part of the metal plate.
  • a suspended ceiling is constituted in a manner known per se by panels 1, having on their upper face loops 2 for the passage of hooks 3, themselves fixed to a slab 4, constituting the floor d 'an upper floor.
  • This basic metal plate 6 has holes 20 to allow it to be screwed to the wall element (fig. 2).
  • the construction of the transducer shown in Figures 2 and 3 is very close to that of a loudspeaker.
  • the base metal plate 6 has a cylindrical central part 7 made of non-ferromagnetic material, for example aluminum.
  • This cylinder carries a winding 8, the two ends of which are connected to two contact fingers 9 and 9 '.
  • the transducer comprises a magnetic carcass comprising a ferromagnetic central part 12 integral with a flange 13, a permanent magnet 14 in the form of a disc, a permanent magnet 15 in the form of an annulus, a part 11 in the form of a bell and a flat metal ring 17.
  • the flange 13 is disposed between the magnet 14 in the form of a disc and the magnet 15 of annular shape, an annular part 16 made of non-ferromagnetic material keeping the latter 15 centered relative to the central part 12.
  • the magnetic carcass 11 to 17 is connected to the plate 6 by a piece 10 of elastomer.
  • This part 10 constitutes a dust-tight annular seal between the plate 6 and the bell-shaped part 11.
  • the elastomer part 10 has two internal annular ribs 18 and 19, the first is engaged in a peripheral groove at the base of the skirt of the part 11 in the shape of a bell.
  • the base of the part 10 is engaged in a large centering groove 21 provided in the plate 6.
  • the cylindrical part 7 and the winding 8 engage in a cylindrical space provided between the central part 12 and the annular part 16 for centering.
  • the elastomer part 10 has sufficient flexibility to allow relative axial displacements between the cylinder 7 and the central core 12, while ensuring good radial guidance between this core 12 and the cylinder 7.
  • the magnetic carcass with the magnets 14 and 15 constitutes a relatively heavy part, which acts as a mass of inertia, so that the relative displacements between the core 12 and the cylinder 7 transmit vibrations to the plate 6 and therefore to the panels 1 from the suspended ceiling.
  • transducers 5 must be connected so as to be in phase with one another.
  • transducers can be fixed to any other wall element, this wall can be a wall of the room to be sounded or a wall of a piece of furniture located in this room. Ultimately, a single transducer may be sufficient when the room does not have large dimensions.
  • the transducer 5 includes means for exerting a force on the elastomer part 10 so as to modify its elasticity characteristics.
  • These means include a central adjustment screw 22 connecting the magnetic casing 11 -17 to the oscillating element 6 - 8.
  • the head of the adjustment screw 22 is supported on a washer 23 and the latter in turn is supported on a elastic element consisting of a rubber ring 24 inserted in a recess 25 provided in the central part of the metal plate 6 of the oscillating element 6 - 8.
  • the screw 22 engages by its other end in a tapped hole in the part central 12.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Transducers For Ultrasonic Waves (AREA)

Abstract

The electroacoustic transducer comprises an oscillating element (6, 7) holding a coil (8), the oscillating element (6, 7) being connected to a magnet frame (11-17) by an elastomer ring (10'). The magnet frame (11-17) has two magnets (14, 15) and constitutes an inertial mass. The oscillating element (6, 7) is intended to be attached rigidly by its base plate (6) to a panel (1) so that the sound waves are transmitted to the latter (1) which thus plays the role of a speaker diaphragm. Adjusting screws (27) make it possible to modify the characteristics of the elastomer (10') as a function of the mounting condition and the desired sound diffusion effect.

Description

On connaît déjà des transducteurs électroacoustiques comprenant une carcasse magnétique avec un entrefer cylindrique annulaire et un élément oscillant portant une bobine plongée dans cet entrefer, cet élément oscillant étant conformé pour permettre sa fixation à un panneau pour lui transmettre des vibrations sonores, la carcasse constituant une masse d'inertie reliée a l'élément oscillant par une pièce élastique.Electroacoustic transducers are already known comprising a magnetic carcass with an annular cylindrical air gap and an oscillating element carrying a coil immersed in this air gap, this oscillating element being shaped to allow its attachment to a panel to transmit sound vibrations to it, the carcass constituting a mass of inertia connected to the oscillating element by an elastic piece.

Des transducteurs de ce genre sont décrits par exemple dans les brevets américains Nos 3 524 027 et 3 728 497 et français N° 1 514 600. Le brevet britanique N° 1 447 588 montre un transformateur électromécanique pouvant être réalisé à partir de transducteurs d'un type existant dans le commerce pour l'actionnement de hauts-parleurs et dans lequel une plaque de base est reliée élastiquement à une carcasse magnétique par une bague annulaire en élastomère.Transducers of this kind are described, for example, in US Pat. Nos. 3,524,027 and 3,728,497 and French No. 1,514,600. British patent No. 1,447,588 shows an electromechanical transformer which can be produced from transducers a commercially available type for actuating loudspeakers and in which a base plate is connected elastically to a magnetic carcass by an annular elastomer ring.

L'invention concerne un transducteur du genre précité dans lequel le guidage de la bobine dans l'entrefer est excellent, ce qui permet de monter ce transducteur dans n'importe quelle position. Ce résultat est obtenu grâce au fait que l'élément oscillant est constitué par une plaque métallique portant un cylindre en métal non ferromagnétique servant de support à la bobine, cette plaque présentant des trous pour permettre sa fixation audit panneau, la pièce élastique étant de forme annulaire, en élastomère, portée par ladite plaque métallique et entourant la base d'une pièce en forme de cloche formant l'enveloppe de la carcasse pour la relier de façon étanche à ladite plaque et pour assurer le centrage de la bobine dans l'entrefer, la carcasse étant maintenue axialement contre la pièce en élastomère par une vis engagée dans un filetage axial du pôle central de la carcasse, la tête de cette vis prenant appui sur une rondelle s'appuyant à son tour sur une bague en caoutchouc, la vis, la rondelle et la bague étant toutes disposées à l'intérieur d'un évidement prévu dans la partie centrale de la plaque métallique.The invention relates to a transducer of the aforementioned type in which the guidance of the coil in the air gap is excellent, which makes it possible to mount this transducer in any position. This result is obtained thanks to the fact that the oscillating element is constituted by a metal plate carrying a non-ferromagnetic metal cylinder serving as support for the coil, this plate having holes to allow its fixing to said panel, the elastic part being of shape annular, made of elastomer, carried by said metal plate and surrounding the base of a bell-shaped part forming the casing of the carcass to connect it in leaktight manner to said plate and to ensure the centering of the coil in the air gap , the carcass being held axially against the elastomer part by a screw engaged in an axial thread of the central pole of the carcass, the head of this screw resting on a washer in turn resting on a rubber ring, the screw , the washer and the ring being all arranged inside a recess provided in the central part of the metal plate.

Le dessin annexé représente schematiquement et à titre d'exemple l'invention.

  • La figure 1 est une coupe verticale d'un plafond suspendu, équipé de transducteurs électroacoustiques selon l'invention.
  • La figure 2 est une vue de dessus d'un transducteur comportant certaines caractéristiques de l'invention.
  • La figure 3 est une coupe selon la ligne III-III de la figure 2.
  • La figure 4 est une vue partielle en coupe axiale du transducteur électro-acoustique selon l'invention.
The accompanying drawing shows schematically and by way of example the invention.
  • Figure 1 is a vertical section of a suspended ceiling, equipped with electroacoustic transducers according to the invention.
  • Figure 2 is a top view of a transducer having certain features of the invention.
  • Figure 3 is a section along line III-III of Figure 2.
  • Figure 4 is a partial view in axial section of the electro-acoustic transducer according to the invention.

En référence à la figure 1, un plafond suspendu est constitué de façon connue en soi par des panneaux 1, présentant à leur face supérieure des boucles 2 pour le passage de crochets 3, fixés eux-mêmes à une dalle 4, constituant le plancher d'un étage supérieur.Referring to Figure 1, a suspended ceiling is constituted in a manner known per se by panels 1, having on their upper face loops 2 for the passage of hooks 3, themselves fixed to a slab 4, constituting the floor d 'an upper floor.

Plusieurs de ces panneaux 1 sont équipés d'un ou de plusieurs transducteurs électroacoustiques 5. Ces derniers sont rendus solidaires du panneau 1 par leur plaque métallique de base 6.Several of these panels 1 are equipped with one or more electroacoustic transducers 5. The latter are made integral with the panel 1 by their basic metal plate 6.

Cette plaque métallique de base 6 présente des trous 20 pour permettre de la visser à l'élément de paroi (fig. 2).This basic metal plate 6 has holes 20 to allow it to be screwed to the wall element (fig. 2).

La construction du transducteur représente aux figures 2 et 3 est très proche de celle d'un haut-parleur. La plaque métallique de base 6 présente une partie centrale cylindrique 7 en matière non ferromagnétique, par exemple en aluminium. Ce cylindre porte un enroulement 8 dont les deux extrémités sont reliées à deux doigts de contact 9 et 9'.The construction of the transducer shown in Figures 2 and 3 is very close to that of a loudspeaker. The base metal plate 6 has a cylindrical central part 7 made of non-ferromagnetic material, for example aluminum. This cylinder carries a winding 8, the two ends of which are connected to two contact fingers 9 and 9 '.

La plaque métallique de base 6, sa partie cylindrique 7 et l'enroulement 8 constituent ensemble un élément oscillant du transducteur 5.The base metal plate 6, its cylindrical part 7 and the winding 8 together constitute an oscillating element of the transducer 5.

Comme le montre la figure 3 le transducteur comporte une carcasse magnétique comprenant une pièce centrale 12 ferromagnétique solidaire d'un flasque 13, un aimant permanent 14 en forme de disque, un aimant permanent 15 de forme annulaire, une pièce 11 en forme de cloche et un anneau métallique plat 17. Le flasque 13 est disposé entre l'aimant 14 en forme de disque et l'aimant 15 de forme annulaire, une pièce annulaire 16 en matière non ferromagnetique maintenant ce dernier 15 centré par rapport à la pièce centrale 12.As shown in FIG. 3, the transducer comprises a magnetic carcass comprising a ferromagnetic central part 12 integral with a flange 13, a permanent magnet 14 in the form of a disc, a permanent magnet 15 in the form of an annulus, a part 11 in the form of a bell and a flat metal ring 17. The flange 13 is disposed between the magnet 14 in the form of a disc and the magnet 15 of annular shape, an annular part 16 made of non-ferromagnetic material keeping the latter 15 centered relative to the central part 12.

La carcasse magnétique 11 à 17 est reliée à la plaque 6 par une pièce 10 en élastomère. Cette piece 10 constitue un joint annulaire étanche à la poussière entre la plaque 6 et la pièce 11 en forme de cloche.The magnetic carcass 11 to 17 is connected to the plate 6 by a piece 10 of elastomer. This part 10 constitutes a dust-tight annular seal between the plate 6 and the bell-shaped part 11.

Il y a lieu de remarquer que la pièce 10 en élastomère présente deux nervures annulaires intérieures 18 et 19, la première est engagée dans une gorge périphérique à la base de la jupe de la pièce 11 en forme de cloche.It should be noted that the elastomer part 10 has two internal annular ribs 18 and 19, the first is engaged in a peripheral groove at the base of the skirt of the part 11 in the shape of a bell.

La base de la pièce 10 est engagée dans une large rainure de centrage 21 prévue dans la plaque 6.The base of the part 10 is engaged in a large centering groove 21 provided in the plate 6.

La partie cylindrique 7 et l'enroulement 8 s'engagent dans un espace cylindrique prévu entre la pièce centrale 12 et la pièce annulaire 16 de centrage.The cylindrical part 7 and the winding 8 engage in a cylindrical space provided between the central part 12 and the annular part 16 for centering.

La piece 10 en élastomère présente une souplesse suffisante pour permettre des déplacements relatifs axiaux entre le cylindre 7 et le noyau central 12, tout en assurant un bon guidage radial entre ce noyau 12 et le cylindre 7.The elastomer part 10 has sufficient flexibility to allow relative axial displacements between the cylinder 7 and the central core 12, while ensuring good radial guidance between this core 12 and the cylinder 7.

La carcasse magnétique avec les aimants 14 et 15 constitue une pièce relativement lourde, qui agit comme une masse d'inertie, de sorte que les déplacements relatifs entre le noyau 12 et le cylindre 7 transmettent des vibrations à la plaque 6 et donc aux panneaux 1 du plafond suspendu.The magnetic carcass with the magnets 14 and 15 constitutes a relatively heavy part, which acts as a mass of inertia, so that the relative displacements between the core 12 and the cylinder 7 transmit vibrations to the plate 6 and therefore to the panels 1 from the suspended ceiling.

Ces panneaux jouent le rôle d'une membrane de haut-parleur. Dans la plupart des cas, l'élément de paroi présente une grande surface, ce qui permet une bonne qualité de reproduction des signaux musicaux, notamment des notes graves.These panels act as a speaker membrane. In most cases, the wall element has a large surface area, which allows good quality reproduction of musical signals, especially notes. serious.

Bien entendu, il est nécessaire de choisir le nombre des transducteurs 5 en fonction du niveau sonore que l'on désire obtenir dans l'espace qui doit être sonorisé.Of course, it is necessary to choose the number of transducers 5 as a function of the sound level which it is desired to obtain in the space which is to be soundproofed.

Il va de soi que les transducteurs 5 doivent être branchés de façon à être en phase les uns avec les autres.It goes without saying that the transducers 5 must be connected so as to be in phase with one another.

Il est clair que les transducteurs peuvent être fixes à tout autre élément de paroi, cette paroi pouvant être une paroi du local à sonoriser ou encore une paroi d'un meuble situé dans ce local. A la limite un seul transducteur peut être suffisant lorsque le local ne présente pas de grandes dimensions.It is clear that the transducers can be fixed to any other wall element, this wall can be a wall of the room to be sounded or a wall of a piece of furniture located in this room. Ultimately, a single transducer may be sufficient when the room does not have large dimensions.

Comme représenté à la figure 4, le transducteur 5' comporte des moyens pour exercer une force sur la pièce 10 en élastomère de façon à modifier ses caractéristiques d'élasticité. Ces moyens comprennent une vis de réglage central 22 reliant la carcasse magnétique 11 -17 à l'élément oscillant 6 - 8. La tête de la vis de réglage 22 prend appui sur une rondelle 23 et cette dernière s'appuie à son tour sur un élément elastique constitué par une bague 24 en caoutchouc insérée dans un évidement 25 prévu dans la partie centrale de la plaque métallique 6 de l'élément oscillant 6 - 8. La vis 22 s'engage par son autre extrémité dans un trou taraudé de la pièce centrale 12. Par action sur la vis de réglage 22, il est ainsi possible d'appliquer une force plus ou moins grande sur la pièce 10 en élastomère de façon a obtenir des conditions optimales de diffusion des ondes sonores.As shown in Figure 4, the transducer 5 'includes means for exerting a force on the elastomer part 10 so as to modify its elasticity characteristics. These means include a central adjustment screw 22 connecting the magnetic casing 11 -17 to the oscillating element 6 - 8. The head of the adjustment screw 22 is supported on a washer 23 and the latter in turn is supported on a elastic element consisting of a rubber ring 24 inserted in a recess 25 provided in the central part of the metal plate 6 of the oscillating element 6 - 8. The screw 22 engages by its other end in a tapped hole in the part central 12. By action on the adjusting screw 22, it is thus possible to apply a greater or lesser force on the piece 10 of elastomer so as to obtain optimal conditions for the diffusion of sound waves.

Claims (3)

1. An electroacoustic transducer comprising a magnetic frame (11-17) with an annular cylindrical air gap and an oscillating element (6-8) holding a coil (8) immersed in this air gap, this oscillating element being shaped to make it possible to attach it to a panel (1) so as to transmit sound vibrations to this panel, the frame constituting an inertial mass connected to the oscillating element by an elastic piece (10), characterized in that the oscillating element consists of a metal plate (6) holding a non-ferromagnetic metal cylinder (7) serving as support to the coil (8), this plate exhibiting holes (20) to make it possible to attach it to said panel (1), the elastic piece (10) being ring-shaped, in elastomer, carried by said metal plate (6) and surrounding the base of a bell-shaped piece (11) forming the envelope of the frame, to connect it tightly to said piate and to ensure the centering of the coil in the air gap, the frame being axially maintained against the elastomer piece by a screw (22) engaged in an axial thread of the central pole of the frame, the head of this screw engaging on a washer (23) which in turn abuts on a rubber ring (24), the screw, washer and ring all being placed inside a recess (25) provided in the central part of the metal plate.
2. Transducer according to claim 1, characterized in that the metal plate (6) exhibits a centering groove (21) to receive the edge of the elastomer ringshaped piece (10).
3. Transducer according to claims 1 or 2, characterized in that the elastomer ring shaped piece presents an inner circular rib (18) engaged in a peripheral groove of the bell-shaped piece (11
EP82810561A 1981-12-22 1982-12-21 Electro-acoustic transducer Expired EP0083310B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT82810561T ATE26055T1 (en) 1981-12-22 1982-12-21 ELECTROACOUSTIC TRANSDUCER.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH819981A CH645227A5 (en) 1981-12-22 1981-12-22 ELECTRO-ACOUSTIC TRANSDUCER.
CH8199/81 1981-12-22

Publications (2)

Publication Number Publication Date
EP0083310A1 EP0083310A1 (en) 1983-07-06
EP0083310B1 true EP0083310B1 (en) 1987-03-18

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ID=4336681

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82810561A Expired EP0083310B1 (en) 1981-12-22 1982-12-21 Electro-acoustic transducer

Country Status (6)

Country Link
US (1) US4506117A (en)
EP (1) EP0083310B1 (en)
AT (1) ATE26055T1 (en)
CA (1) CA1191937A (en)
CH (1) CH645227A5 (en)
DE (1) DE3275803D1 (en)

Families Citing this family (45)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3414407C2 (en) * 1984-04-17 1986-02-20 Jürgen 6804 Ilvesheim Quaas Arrangement of sound transducers in a sound guide, in particular for loudspeaker boxes
JPS6121699A (en) * 1984-07-10 1986-01-30 Pioneer Electronic Corp Electric vibrating transducer
US4852444A (en) * 1986-12-04 1989-08-01 Hoover Alan A Electro-mechanical transducer which couples positive acoustic feedback into an electric amplified guitar body for the purpose of sustaining played notes
US6003766A (en) 1995-09-02 1999-12-21 New Transducers Limited Vending machine
KR19990044032A (en) * 1995-09-02 1999-06-25 에이지마. 헨리 Display screen with loudspeakers
WO1997009843A1 (en) * 1995-09-02 1997-03-13 New Transducers Limited Loudspeakers comprising panel-form acoustic radiating elements
DE69602101T2 (en) * 1995-09-02 1999-09-16 New Transducers Ltd INERTIAL VIBRATOR
AU703061B2 (en) * 1995-09-02 1999-03-11 New Transducers Limited Vibration transducers
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
US6215881B1 (en) * 1995-09-02 2001-04-10 New Transducers Limited Ceiling tile loudspeaker
US6519349B1 (en) 1995-09-02 2003-02-11 New Transducers Limited Loudspeaker
US6553124B2 (en) * 1995-09-02 2003-04-22 New Transducers Limited Acoustic device
US6192136B1 (en) * 1995-09-02 2001-02-20 New Transducers Limited Inertial vibration transducers
US6278787B1 (en) * 1996-09-03 2001-08-21 New Transducers Limited Loudspeakers
US6606390B2 (en) * 1996-09-03 2003-08-12 New Transducer Limited Loudspeakers
US6618487B1 (en) 1996-09-03 2003-09-09 New Transducers Limited Electro-dynamic exciter
GB9701983D0 (en) * 1997-01-31 1997-03-19 New Transducers Ltd Electro-dynamic exciter
US6229903B1 (en) * 1999-06-14 2001-05-08 Citizen Electronics Co., Ltd. Mounting structure for electromagnetic sound generator
US6556684B1 (en) * 2000-03-01 2003-04-29 Watkins Manufacturing Corporation Spa audio system
US6329908B1 (en) 2000-06-23 2001-12-11 Armstrong World Industries, Inc. Addressable speaker system
MXPA02007382A (en) * 2000-10-17 2002-12-09 Bosio Alejandro Jose Ped Lopez Equalizable electro-acoustic device used in commercial panels and method for converting said panels.
US7372968B2 (en) * 2000-11-08 2008-05-13 New Transducers Limited Loudspeaker driver
WO2004034735A1 (en) * 2002-10-11 2004-04-22 Lopez Bosio Alejandro Jose Ped Equalizable active electroacoustic device for panels, and method of converting the panels and assembling the devices
US20080085029A1 (en) * 2003-04-29 2008-04-10 Hagman Paul N In-wall speaker system method and apparatus
US7292702B2 (en) 2003-04-29 2007-11-06 Dimensional Communications, Inc. In-wall speaker system method and apparatus
US7181038B2 (en) * 2004-03-10 2007-02-20 Ksc Industries Incorporated Electro-acoustic transducer
JP2005311500A (en) * 2004-04-19 2005-11-04 Toyota Boshoku Corp Vehicle acoustic apparatus
US20060013417A1 (en) * 2004-07-16 2006-01-19 Intier Automotive Inc. Acoustical panel assembly
JP4784398B2 (en) * 2006-05-29 2011-10-05 パナソニック株式会社 Acoustic exciter and speaker using the same
EP2301259B1 (en) * 2008-07-17 2020-05-13 Tectonic Audio Labs Inc. Inertial vibration exciter
DE102009048866A1 (en) 2009-08-27 2011-03-03 Bösnecker, Robert, Dr. Device for vibration stimulation of diaphragms or diaphragm-type materials showing frequencies in audio range of humans, has electrical change signal partly converted in mechanical motion, where converter possess hole or opening
JP5314588B2 (en) * 2009-12-21 2013-10-16 株式会社エフ・ピー・エス Composite speaker, sound image display device, and vehicle acoustic system
CN202799121U (en) * 2012-08-21 2013-03-13 瑞声声学科技(常州)有限公司 Vibration sounding device
DE202014003034U1 (en) * 2014-04-02 2015-04-07 Harman Becker Automotive Systems Gmbh speaker
RU2556272C2 (en) * 2014-04-03 2015-07-10 Закрытое акционерное общество "Защита электронных технологий" Vibratory noise unit for acoustic voice data leak channel
EP3170317B1 (en) 2014-07-16 2020-04-08 Traxxas LP On-board audio system for a model vehicle
USD834111S1 (en) 2014-10-01 2018-11-20 Traxxas Lp Transducer mount
US11666942B2 (en) 2016-07-25 2023-06-06 Haptech Holdings, Inc. Haptic transducer and footplate coupled to the same
US10835924B1 (en) * 2016-07-25 2020-11-17 SonicSensory, Inc. Haptic transducer device and insole for receiving the same
US10848874B2 (en) * 2018-02-20 2020-11-24 Google Llc Panel audio loudspeaker electromagnetic actuator
US10587949B1 (en) 2018-03-28 2020-03-10 Paul N. Hagman Acoustically tuned face panel for speaker system
US10841704B2 (en) 2018-04-06 2020-11-17 Google Llc Distributed mode loudspeaker electromagnetic actuator with axially and radially magnetized circuit
GB201820557D0 (en) 2018-12-17 2019-01-30 Pss Belgium Nv Inertial exciter
KR20210125374A (en) * 2020-04-08 2021-10-18 한국전자통신연구원 Smart housing system and method using digital twin
GB202009203D0 (en) 2020-06-17 2020-07-29 Pss Belgium Nv Loudspeaker

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728497A (en) * 1970-07-06 1973-04-17 A Komatsu Dynamic loudspeaker using wall as diaphragm
GB1447588A (en) * 1973-04-18 1976-08-25 Jagle M Vibratory dance floor

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE484872C (en) * 1929-10-26 Bothe & Bauch Facility for acoustic shop window advertising
FR556412A (en) * 1923-05-09 1923-07-20 Const Electr De Lyon Et Du Dau Improvements to speaker phones
US3366749A (en) * 1964-04-09 1968-01-30 Allen Alan A Audio transducer
US3430007A (en) * 1966-03-16 1969-02-25 Rolen Diversified Investors In Dynamic transducer with wall mounted diaphragm
US3524027A (en) * 1967-05-04 1970-08-11 Rolen Diversified Investors In Sound transducer with wall mounted diaphragm
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
US3801943A (en) * 1971-06-16 1974-04-02 J Bertagni Electoacoustic transducers and electromagnetic assembly therefor
US3925627A (en) * 1974-06-13 1975-12-09 William J Ashworth Transducer mounting to sounding board

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3728497A (en) * 1970-07-06 1973-04-17 A Komatsu Dynamic loudspeaker using wall as diaphragm
GB1447588A (en) * 1973-04-18 1976-08-25 Jagle M Vibratory dance floor

Also Published As

Publication number Publication date
CA1191937A (en) 1985-08-13
DE3275803D1 (en) 1987-04-23
CH645227A5 (en) 1984-09-14
EP0083310A1 (en) 1983-07-06
ATE26055T1 (en) 1987-04-15
US4506117A (en) 1985-03-19

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