EP1078551B1 - Haut-parleur a panneaux - Google Patents

Haut-parleur a panneaux Download PDF

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Publication number
EP1078551B1
EP1078551B1 EP99924967A EP99924967A EP1078551B1 EP 1078551 B1 EP1078551 B1 EP 1078551B1 EP 99924967 A EP99924967 A EP 99924967A EP 99924967 A EP99924967 A EP 99924967A EP 1078551 B1 EP1078551 B1 EP 1078551B1
Authority
EP
European Patent Office
Prior art keywords
panel
periphery
panel loudspeaker
connecting elements
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
EP99924967A
Other languages
German (de)
English (en)
Other versions
EP1078551A1 (fr
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
Andreas Ziganki
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 EP1078551A1 publication Critical patent/EP1078551A1/fr
Application granted granted Critical
Publication of EP1078551B1 publication Critical patent/EP1078551B1/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
    • H04R7/045—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
    • H04R7/02—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
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/201—Damping aspects of the outer suspension of loudspeaker diaphragms by addition of additional damping means

Definitions

  • the invention is concerned with panel loudspeakers, in particular with the Improvement of the low-frequency radiation of such record speakers.
  • connection elements connected to a periphery. This periphery allows on the one hand, the outer holding of the entire record speaker and provides on the other hand, a favorable for the sound reproduction of the weight of the Panels and the drive system or systems used safely.
  • Characteristic of such sound reproducing arrangements in the form of Record speakers is that from a critical lower cut-off frequency "Bending wave radiation" is possible, the bending waves in Record speakers for sound radiation with frequency-dependent direction to lead.
  • a section through a created directional diagram shows a main lobe, whose direction is frequency dependent.
  • the panel of the panel loudspeaker is constructed according to the sandwich principle in that, for example, two opposing surfaces of a very light core layer, each with a cover layer that is thin in comparison to the core layer, for example. Bonding are connected.
  • the material for the cover layer must have a particularly high expansion wave speed.
  • Suitable cover layer materials are, for example, thin metal foils or fiber-reinforced plastic foils. Special requirements are also placed on the core layer, because this layer must above all have a particularly low density (for example 20 to 30 kg / m 3) .
  • the core layer should be able to absorb high shear stresses normal to the cover layers.
  • the modulus of elasticity in the direction normal to the cover layers must be sufficiently large, while a very low modulus of elasticity does not interfere parallel to the cover layers.
  • the core layer can exhibit anisotropic or isotropic behavior.
  • honeycombs made of light metal alloys or resin-impregnated fiber-reinforced papers (anisotropic) and rigid foams (isotropic) have proven themselves as ultra-light core layer structures.
  • magnet systems known from the prior art are generally used by attaching them to the panel or also integrating them into the panel.
  • the multi-resonance principle should "free" the edge of the panel if possible be, i.e. the transverse vibrations spreading on the panel should be neither fixed nor damped in the edge area of the panel.
  • the invention is therefore based on the object of specifying plate loudspeakers, which improved despite relatively small panel areas Have sound reproduction performance in the low frequency range.
  • the respective connecting elements of one or also formed two cover layers by the respective cover layers Spanning lateral distance to the periphery is a very inexpensive and in the production very easily realizable unit from periphery and Panel created.
  • the respective periphery is formed by a frame, can such arrangements with little effort with other objects can be connected, because the necessary for the generation of the necessary voltage in the Cover layers and / or connecting elements already work can be carried out in the factory with high manufacturing quality.
  • the plate loudspeakers according to the invention are also not merely monotonic Sound reproduction arrangements can be used. Rather, it is according to claim 4 also possible to make a plurality of panel speakers to a larger one Combine baffle without the individual panel directly with a peripherals not excited by transducers. Rather, in Connection with the invention shown that the otherwise for connection to a peripherals that are not excited (e.g. a Ralunen) Connecting elements for the mutual and decoupled connection of used adjacent panels of a larger baffle can be.
  • the mechanical tension of the connecting elements and / or the Particularly low-frequency resonances can be generated in their cover layers Vibration amplitude can be reduced by the according to claim 8, respectively parts under mechanical tension (cover layers and / or Connection elements) are provided with damping elements 30.
  • the mechanical tension Fasteners and the cover layers may be different. Thereby damping values of different sizes can be very easily with the realize different parts.
  • FIG. 1 shows a sound reproduction arrangement 10 in the form of a Record speaker shown, which after the already explained “Bending shaft principle” works.
  • This arrangement 10 is provided by a panel 11 and a periphery 12 is formed.
  • the panel 11, which is shown in more detail in FIG. 3, is sandwich-shaped constructed by a core layer 13, which in the present case is a honeycomb structure has, on two opposite surfaces, each with a thin Sealing layer 14o, 14u is provided.
  • the periphery 12 is in the embodiment shown in Figure 1 by a an opening 15 provided installation wall 16 is formed. In this opening 15 it is Panel 11 used.
  • the connection between the panel 11 and the Periphery 12 in the form of the built-in wall 16 is realized such that a Connecting element 17 with the cover layer 14.o and the installation wall 16 connected is. From Figure 1, which is a top view of a record speaker 10 shows, can also be seen that the connecting element 17 in one piece is formed and the mutual distance A between each other facing edges 24 and 24 'of panel 11 and opening 15 completely covered.
  • a plate speaker 10 is shown, which a plurality of Panels 11 has.
  • the Use of an independent frame 19 in one or more Panels 11 has the advantage that the tension in the connecting elements 17th not only when connecting the panel or panels 11 directly to the respective one Installation location must be carried out, but very simple and factory can be set precisely if the or the respective plate speakers 10 can only be delivered together with a frame 19.
  • the top view according to FIG. 2 shows that the panels 11 different dimensions as well as different distances with each other or with the frame.
  • the different dimensions of the panels 11 are due to the fact that the various panels 11 of the in 2 shows the arrangement 10 shown as a so-called area radiator for different audio frequency ranges are optimized. That kind of Training makes it a decoupling of the various panels 11 also required that the distances between the individual panels 11 or the distances of the panels 11 to the frame 19 the corresponding Playback area of the affected panels 11 can be adjusted. Only the For the sake of completeness it should be noted that because of the different Frequency ranges trained panels 11 optimizes the mechanical tension in the cover layers (not shown in more detail in FIG. 2) of the various panels 11 is also adapted to the corresponding reproduction purposes.
  • FIG. 2 use is also made independent connecting elements 17 dispensed with. Rather, the panels are 11 with each other or with the Ralunen 19 exclusively by means of the cover layer 14o connected. This type of connection is shown in more detail in FIGS. 4b and 5b and will be explained in connection with these figures.
  • FIG. 4a An exemplary embodiment for a frame 19 is shown in FIG. 4a.
  • a panel 11 Above of the frame 19, a panel 11 is arranged.
  • the top layer is slightly above the edges 24 of the Core layer 13 over.
  • the edges 24 "of the cover layer 14.o Tension bars 20 attached. If the cover layer 14.o is now in the arrow direction P1 deformed elastically by external forces and in this state in Lowered direction P2 on the frame 19, arise when the top layer 14.o abuts the frame, conditions shown in Figure 4b.
  • the cover layer 14.o is not included the core layer 13 is connected, the stress in the entire cover layer 14.o built up. To the beneficial effects of the transfer to obtain the tensioned cover layer 14.o, then only the core layer 13 be connected to the cover layer 14.o.
  • Figure 5a and b shows a further embodiment of a mechanical Tensioned connection between a panel 11 and a frame 19.
  • the distance A ' between the clamping bars 20 equal to the distance A "between the opposite lying edges 21 of the frame 19.
  • the required tension in the areas 17 ' the cover layer 14.o is brought about by the fact that after the cover layer 14.o on the frame 19 or the tensioning strips 20 on the edges 21 without tension abut (shown on the left in Figure 5b), one or both Tension bars 20 are rotated in the direction of arrow P3, so that no longer Long side 22, but the narrow side 23 of the clamping bar 20 at the edge 21 the frame 19 abuts (shown on the right side in Figure 5b).
  • both according to FIGS. 4a to 5b with a corresponding modification Cover layers 14.o and 14.u can be under mechanical tension.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

L'invention concerne des haut-parleurs à panneaux (11), fonctionnant selon le principe de la multirésonance. Ces haut-parleurs sont en général constitués d'une couche centrale (13) et d'au moins une couche de recouvrement (14.o, 14.u) reliée à cette dernière. Il est en outre prévu une zone périphérique (12) qui entoure le haut-parleur à panneaux (11), à une distance latérale A, ledit haut-parleur à panneaux (11) étant relié à la zone périphérique (12) au moyen d'éléments de raccordement (17, 17'). Bien que ces haut-parleurs à panneaux (11) permettent d'obtenir une bonne restitution dans les aigus et les médiums, il est prouvé que des surfaces de panneaux, de dimensions importantes non souhaitables, sont nécessaires pour une bonne restitution des graves. En l'absence de telles surfaces de panneaux, les résonances de panneaux les plus graves, assurant la restitution des graves, se déplacent vers la plage des fréquences moyennes. L'invention vise par conséquent à créer des haut-parleurs à panneaux (11) qui présentent une restitution des graves améliorées même avec des surfaces de panneaux relativement petites. A cet effet, les éléments de raccordement (17, 17') sont sollicités mécaniquement lorsqu'ils sont reliés à la zone périphérique (12). Il en résulte, en plus des résonances graves de panneaux déjà présentes, des résonances de type tambour supplémentaires, particulièrement graves. Ces dernières peuvent être modulées par la sollicitation des éléments de raccordement (17, 17').

Claims (8)

  1. Haut-parleur à plaques comprenant
    une couche de noyau (13) et au moins une couche de revêtement (14.o,14.u)
    une périphérie (12) entourant le haut-parleur à plaques (11) en laissant au moins un intervalle latéral (A),
    des éléments de liaison (17, 17") reliant le haut-parleur à plaques (11) à la périphérie (12), les éléments de liaison (17, 17") étant sous tension mécanique lorsqu'ils sont reliés à la périphérie (12),
    caractérisé en ce que
    les zones des couches de revêtement (14.o, 14.u) et reliées à la couche de noyau (13) sont sous tension mécanique.
  2. Haut-parleur à plaques selon la revendication 1,
    caractérisée en ce que
    les éléments de liaison (17, 17") sont formés par là où les couches de revêtement (14.o, 14.u) du haut-parleur à plaques (11) respectif, et pour cela au moins l'une des couches de revêtement (14.o, 14.u) du haut-parleur (11) respectif est prolongé jusqu'à la périphérie (12).
  3. Haut-parleur selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    la périphérie est formée par un cadre (19).
  4. Haut-parleur selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    la périphérie (12) du haut-parleur à plaques (11) est formé par au moins une plaque (10).
  5. Haut-parleur selon l'une quelconque des revendications 1 ou 2,
    caractérisé en ce que
    les bords (24") des éléments de liaison (17, 17") respectifs, reliés à la périphérie (12) sont munis de baguettes (20),
    la périphérie est munie d'arêtes (21) contre lesquelles s'appliquent les baguettes (20) lorsque le haut-parleur à plaques (11) est relié à la périphérie (12), et
    lorsque le haut-parleur à plaques (11) n'est pas encore relié à la périphérie (12), les distances (A') entre les baguettes (20) et les axes de coordonnées (x, y) passant par le centre du haut-parleur à plaques (11) respectif sont inférieures au distances (A") entre les arêtes (21) et les lignes de coordonnées (x, y) qui passent également par le centre de la périphérie (12).
  6. Haut-parleur selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    le haut-parleur à plaques (11) est une plaque de basses pour reproduire les sons de basses fréquences.
  7. Haut-parleur selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    la couche de noyau (13) et/ou les éléments de liaison (17, 17") comportent des éléments amortisseurs (30).
  8. Haut-parleur selon la revendication 7,
    caractérisé en ce que
    la tension mécanique dans les éléments de liaison (17, 17") est différente de la tension mécanique des couches de revêtement (14.o, 14.u) mises en tension.
EP99924967A 1998-05-15 1999-05-14 Haut-parleur a panneaux Expired - Lifetime EP1078551B1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19821855A DE19821855A1 (de) 1998-05-15 1998-05-15 Plattenlautsprecher
DE19821855 1998-05-15
PCT/EP1999/003312 WO1999060818A1 (fr) 1998-05-15 1999-05-14 Haut-parleur a panneaux

Publications (2)

Publication Number Publication Date
EP1078551A1 EP1078551A1 (fr) 2001-02-28
EP1078551B1 true EP1078551B1 (fr) 2002-04-24

Family

ID=7867898

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99924967A Expired - Lifetime EP1078551B1 (fr) 1998-05-15 1999-05-14 Haut-parleur a panneaux

Country Status (4)

Country Link
US (1) US7236601B1 (fr)
EP (1) EP1078551B1 (fr)
DE (2) DE19821855A1 (fr)
WO (1) WO1999060818A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19840375C2 (de) * 1998-09-04 2003-08-28 Harman Audio Electronic Sys Schallwand
DE19922395C1 (de) * 1999-05-14 2001-01-11 Harman Audio Electronic Sys Deckenelement
DE10001408C2 (de) * 2000-01-14 2002-09-05 Harman Audio Electronic Sys Plattenlautsprecher
DE10001410C2 (de) 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
GB0018996D0 (en) 2000-08-03 2000-09-20 New Transducers Ltd Bending wave loudspeaker
US6826285B2 (en) 2000-08-03 2004-11-30 New Transducers Limited Bending wave loudspeaker
DE10154915B4 (de) * 2001-11-08 2005-02-03 Harman/Becker Automotive Systems Gmbh (Harman Division) Flachlautsprecheranordnung
DE102007062874A1 (de) * 2007-12-28 2009-07-09 Siemens Ag Veränderung der Schallabstrahlung bei Flächenlautsprechern
CN102106159A (zh) 2008-07-28 2011-06-22 Nxp股份有限公司 声学换能器的薄膜
US8540049B2 (en) 2010-12-23 2013-09-24 Bose Corporation Acoustic diaphragm suspending
US10226133B2 (en) * 2012-03-08 2019-03-12 Robert Katz Audio headboard
JP6047575B2 (ja) * 2012-08-10 2016-12-21 京セラ株式会社 音響発生器、音響発生装置および電子機器
DE102012025313B3 (de) * 2012-12-22 2014-02-20 Audi Ag Schallwandler zur Wandlung elektrischer Signale in Luftschall
US9113250B2 (en) * 2013-05-29 2015-08-18 Tang Band Industries Co., Ltd. Speaker with diaphragm arrangement
US9154862B2 (en) 2013-06-27 2015-10-06 The Boeing Company Flat panel loudspeaker system

Family Cites Families (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3247925A (en) 1962-03-08 1966-04-26 Lord Corp Loudspeaker
JPS5525285A (en) * 1978-08-14 1980-02-22 Sony Corp Speaker
GB2082021B (en) 1980-07-08 1984-05-23 Matsushita Electric Ind Co Ltd Electrodynamic loudspeaker
DE3041742C2 (de) * 1980-11-05 1982-10-28 Siemens AG, 1000 Berlin und 8000 München Luftschallgeber
CA1284837C (fr) 1987-06-18 1991-06-11 Highwood Audio Inc. Transducteur audio
DE69601723T2 (de) * 1995-09-02 1999-09-16 New Transducers Ltd Lautsprecher mit plattenförmigen abstrahlelementen
US6003766A (en) * 1995-09-02 1999-12-21 New Transducers Limited Vending machine
DE19757098C2 (de) 1997-12-20 2003-01-09 Harman Audio Electronic Sys Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip
DE19757097B4 (de) 1997-12-20 2004-04-15 Harman Audio Electronic Systems Gmbh Schallwiedergabeanordnung
DE19821861A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Vorrichtung zur dynamischen Anregung von Plattenlautsprechern
DE19821860A1 (de) * 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Treiber für flaches Klangpaneel
DE19821624A1 (de) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Projektionswand
DE19840375C2 (de) 1998-09-04 2003-08-28 Harman Audio Electronic Sys Schallwand
DE10001410C2 (de) 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
DE10025460B4 (de) 2000-05-23 2004-03-18 Harman Audio Electronic Systems Gmbh Hochtonlautsprecher

Also Published As

Publication number Publication date
DE59901306D1 (de) 2002-05-29
US7236601B1 (en) 2007-06-26
EP1078551A1 (fr) 2001-02-28
DE19821855A1 (de) 1999-11-18
WO1999060818A1 (fr) 1999-11-25

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