EP1078552B1 - Dispositif pour exciter de maniere dynamique des haut-parleurs a panneaux - Google Patents

Dispositif pour exciter de maniere dynamique des haut-parleurs a panneaux Download PDF

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Publication number
EP1078552B1
EP1078552B1 EP99926308A EP99926308A EP1078552B1 EP 1078552 B1 EP1078552 B1 EP 1078552B1 EP 99926308 A EP99926308 A EP 99926308A EP 99926308 A EP99926308 A EP 99926308A EP 1078552 B1 EP1078552 B1 EP 1078552B1
Authority
EP
European Patent Office
Prior art keywords
sound panel
driver
sound
panel
core layer
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
EP99926308A
Other languages
German (de)
English (en)
Other versions
EP1078552A1 (fr
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
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.)
Harman Audio Electronic Systems GmbH
Original Assignee
Harman Audio Electronic Systems GmbH
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 Harman Audio Electronic Systems GmbH filed Critical Harman Audio Electronic Systems GmbH
Publication of EP1078552A1 publication Critical patent/EP1078552A1/fr
Application granted granted Critical
Publication of EP1078552B1 publication Critical patent/EP1078552B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers
    • 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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • 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

  • the invention relates to a device for dynamic excitation of Record speakers according to the preamble of claim 1.
  • Such devices are for example from US-A-4 514 599, WO-A-97 09859 and WO-A-98 52383 (prior art under Article 54 (3) EPC).
  • Multi-resonance plates are significantly more complex because of the strong edge reflections.
  • This complexity in multi-resonance plates arises from the fact that the Main lobe with frequency-dependent direction from a plurality of other such Main lobes is superimposed, so that a highly diversified directional diagram arises, which is also very frequency dependent.
  • multi-resonance plates have in common that their directional diagrams tend to be on average point away from the perpendicular. This behavior causes the room is more closely involved in the projection of the sound waves.
  • the sound panel is built on the sandwich principle, by two each other opposite surfaces of a very light core layer each with a thin cover layer are connected for example by gluing. So that Sound panel has good sound reproduction properties, the material for the top layer have a particularly high expansion shaft speed.
  • Suitable cover layer materials are, for example, thin metal foils or also fiber-reinforced plastic films.
  • the core layer There are also special requirements for the core layer. That's the way it is necessary that the usable materials have a low mass density and have low damping.
  • the materials for the Core layer as high a shear modulus perpendicular to the surfaces have, which are connected to the cover layers.
  • the materials usable for core layers in the direction in which later the core layer formed from this material is its largest Has a very low modulus of elasticity. This in relation at first glance contradicting the last two requirements Requirements are most likely to be met by a core layer, the one Hole structure with between the two for coating with the Breakthroughs provided with surface layers preferably has a small cross section.
  • hard foams can also be used as core layer materials because despite their isotropic material properties, these are still suitable shear and have moduli of elasticity. Not to be left unmentioned in this The connection remains that when using rigid foams as material for the core layer, the cover layers have the task of doing the required produce anisotropic behavior of the sound panel.
  • the invention has for its object a plate speaker or better a holder for drivers of multi-resonance plate speakers specify which are connected to the sound panel, but despite the connection with the sound panel do not or only insignificantly hinder its deformation.
  • the Sound panel 11 is a section AA according to FIG. 2 through a plate loudspeaker 10 shown.
  • This plate speaker 10 is essentially one Sound panel 11 and an electromagnetic driver 12 formed.
  • the Sound panel 11 consists of a hard foam Core layer 11 ', which is connected to two cover layers 11 ".
  • the core layer 11 can also be a Have a honeycomb structure.
  • a recess 13 is milled into the sound panel 11, which houses the driver 12.
  • the driver 12 is essentially one Pot-shaped yoke arrangement 14, a permanent magnet 15 and one with a voice coil 16 provided voice coil support 17 is formed.
  • the Voice coil former 17 is also pot-shaped and with its Bottom 17 'connected to the core layer 11' via a plate 18.
  • the Voice coil former 17 by means of a centering membrane 20 with the Inference arrangement 14 connected.
  • page 21 is provided with a bracket 22.
  • This bracket 22nd is provided with three tabs 23 (Fig. 2), which the lateral distance A span between the yoke arrangement 14 and the core layer 11 '.
  • the holder 22 with the tabs 23 made of plastic. Unless a good one If heat dissipation from the driver 12 is desired, the holder 22 can also be used Metal be formed or be reduced to only the tabs 23.
  • Fig. 3 shows a plate speaker, in which the driver 12 is not in the Sound panel 11 is integrated, but is attached to the outside of the sound panel 11.
  • a holder 22 is provided to accommodate the weight of the driver 12, which has an elastic member 25 in the form of a corrugated contour.
  • the holder 22 is formed all the way around and continuously connected to the sound panel 11. Which is through this continuous connection resulting stiffening of the sound panel 11 thereby diminished that the elastic member 25 in the shape of the corrugated Contour can yield to the embossed bending shafts.
  • the driver 12 is also on the outside Sound panel 11 attached and connected to this by means of a bracket 22. Similar to the plate loudspeaker according to FIG. 1, the holder 22 4 also only three tabs 23, which extend from the driver 12 to the sound panel 11 guided and connected to it at points 24 (Fig. 5). As a result of that the tabs 23 have a curved contour (Fig. 4), they act at the same time as elastic members 25 and thus support the free Mobility of the sound panel 11 during operation.
  • the plate loudspeaker according to FIGS. 1 and 2 is still added that the flat tabs 23 used there also with a elastic member 25 can be provided.
  • This elastic member 25 can be provided, for example, in that the tabs 23 are very thin are formed and / or the distance A between the core layer 11 'and the yoke arrangement 14 is enlarged.
  • FIG. 6 shows a section along the center line through a plate loudspeaker 10 according to the invention shown with driver 12 attached to the side.
  • the bracket 22 between the Driver 12 and the sound panel 11 is solved so that the inference arrangement 14 is connected to a ring 26 made of elastic material.
  • This ring 26, which acts as an elastic member 25, was in the present case made of a foam formed and is inserted into a tube 27.
  • the facing the sound panel 11 The end face 28 of the tube 27 is provided with three tabs 23 (only two of which are visible in FIG. 6) are provided, which establish the connection to the sound panel 11. at In this embodiment, the decoupled connection between the driver 12 and the sound panel 11 by a combination of an elastic member 25 and an attachment reduced to three (connection) points 24.
  • modifications of the shown Brackets 22 are possible. For example, it is possible to mount the bracket 22 4 and 6 so that they change one in the sound panel 11 according to FIGS Fig 1 integrated driver 12 attached.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Claims (4)

  1. Dispositif d'excitation dynamique de haut-parleurs à panneaux comportant :
    un panneau sonore (11) ayant une couche de noyau (11') et au moins une couche de recouvrement (11"),
    au moins un organe d'entraínement électromagnétique (12) comportant un système magnétique et,
    une fixation (22) reliant l'organe d'entraínement (12) au panneau sonore (11),
    la fixation (22) de l'organe d'entraínement (12) respectif comportant un anneau (26) en matière élastique qui entoure concentriquement le système magnétique et est relié à celui-ci,
    caractérisé en ce que
    l'anneau (26) est installé dans un tube (27) et est relié à celui-ci, et la face frontale (28) du tube (27) tournée vers le panneau sonore (11) est reliée au panneau sonore (11) par l'intermédiaire de trois pattes (23).
  2. Dispositif selon la revendication 1,
    caractérisé en ce que
    l'organe d'entraínement (12) est fixé sur le panneau sonore (11).
  3. Dispositif selon l'une des revendications 1 ou 2,
    caractérisé en ce que
    la matière élastique est une mousse.
  4. Dispositif selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    l'anneau (26) est relié par toute sa surface intérieure au système magnétique et par toute sa surface extérieure au tube (27).
EP99926308A 1998-05-15 1999-05-14 Dispositif pour exciter de maniere dynamique des haut-parleurs a panneaux Expired - Lifetime EP1078552B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19821861A DE19821861A1 (de) 1998-05-15 1998-05-15 Vorrichtung zur dynamischen Anregung von Plattenlautsprechern
DE19821861 1998-05-15
PCT/EP1999/003309 WO1999060817A1 (fr) 1998-05-15 1999-05-14 Dispositif pour exciter de maniere dynamique des haut-parleurs a panneaux

Publications (2)

Publication Number Publication Date
EP1078552A1 EP1078552A1 (fr) 2001-02-28
EP1078552B1 true EP1078552B1 (fr) 2003-03-05

Family

ID=7867904

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99926308A Expired - Lifetime EP1078552B1 (fr) 1998-05-15 1999-05-14 Dispositif pour exciter de maniere dynamique des haut-parleurs a panneaux

Country Status (4)

Country Link
US (1) US6494289B1 (fr)
EP (1) EP1078552B1 (fr)
DE (2) DE19821861A1 (fr)
WO (1) WO1999060817A1 (fr)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821862A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Schallwiedergabeanordnung
DE19821855A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Plattenlautsprecher
DE19825866A1 (de) 1998-06-10 1999-12-16 Nokia Deutschland Gmbh Plattenlautsprecher
GB2360665B (en) * 1998-06-22 2003-01-15 Slab Technology Ltd Loudspeakers
DE19843079A1 (de) 1998-09-19 2000-03-23 Nokia Deutschland Gmbh Multiresonanzplatte
DE10001410C2 (de) * 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
GB0314007D0 (en) * 2003-06-17 2003-07-23 Harris Hynd Ltd Audio transducer
WO2005002926A1 (fr) * 2003-07-01 2005-01-13 Johnson Controls Gmbh Element d'equipement pour un vehicule, notamment pour un vehicule automobile, et utilisation d'un element d'equipement comme haut-parleur
EP1757161B1 (fr) * 2004-05-14 2016-11-30 Sonion Nederland B.V. Transducteur electroacoustique a membrane double
KR101219041B1 (ko) * 2005-07-07 2013-01-07 삼성디스플레이 주식회사 박막 트랜지스터 표시판 및 그 제조 방법
US8204266B2 (en) 2005-10-21 2012-06-19 Sfx Technologies Limited Audio devices
US7530425B2 (en) * 2006-06-08 2009-05-12 Whitaker Scott R Speaker enclosure for a ceiling or wall mounted speaker method and apparatus
EP2826257A4 (fr) * 2012-03-16 2015-10-28 Nokia Technologies Oy Surface vibrante produisant un son
US9154862B2 (en) * 2013-06-27 2015-10-06 The Boeing Company Flat panel loudspeaker system
US9014413B2 (en) 2013-08-21 2015-04-21 The Boeing Company Dual coil loudspeaker system
US10848874B2 (en) * 2018-02-20 2020-11-24 Google Llc Panel audio loudspeaker electromagnetic actuator
US10841704B2 (en) 2018-04-06 2020-11-17 Google Llc Distributed mode loudspeaker electromagnetic actuator with axially and radially magnetized circuit

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3720285A (en) * 1970-06-30 1973-03-13 Rand Org Ltd Loudspeakers
JPS603277B2 (ja) * 1978-06-15 1985-01-26 ソニー株式会社 スピーカ装置
JPS5568795A (en) * 1978-11-20 1980-05-23 Sony Corp Speaker
EP0054945B1 (fr) * 1980-12-19 1985-10-30 Nissan Motor Co., Ltd. Haut-parleur pour un système audio pour véhicule automobile
US4506759A (en) * 1983-06-20 1985-03-26 Northern Telecom Limited Loudspeaker enclosure arrangement for voice communication terminals
US4899390A (en) * 1986-09-19 1990-02-06 Matsushita Electric Industrial Co., Ltd. Thin speaker having an enclosure within an open portion and a closed portion
DE3811052C1 (fr) * 1988-03-31 1989-08-24 Messerschmitt-Boelkow-Blohm Gmbh, 8012 Ottobrunn, De
HUP9802389A2 (hu) * 1995-09-02 1999-02-01 New Transducers Limited Rezgéskeltő átalakító és hangfal
EP0847676B1 (fr) * 1995-09-02 1999-04-14 New Transducers Limited Transducteurs inertiels de vibrations
US6192136B1 (en) * 1995-09-02 2001-02-20 New Transducers Limited Inertial vibration transducers
GB9709438D0 (en) * 1997-05-10 1997-07-02 New Transducers Ltd Loudspeaker transducer
US6229903B1 (en) * 1999-06-14 2001-05-08 Citizen Electronics Co., Ltd. Mounting structure for electromagnetic sound generator

Also Published As

Publication number Publication date
DE19821861A1 (de) 1999-11-18
EP1078552A1 (fr) 2001-02-28
WO1999060817A1 (fr) 1999-11-25
US6494289B1 (en) 2002-12-17
DE59904458D1 (de) 2003-04-10

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