EP1083770A2 - Transducteur acoustique - Google Patents

Transducteur acoustique Download PDF

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Publication number
EP1083770A2
EP1083770A2 EP00117691A EP00117691A EP1083770A2 EP 1083770 A2 EP1083770 A2 EP 1083770A2 EP 00117691 A EP00117691 A EP 00117691A EP 00117691 A EP00117691 A EP 00117691A EP 1083770 A2 EP1083770 A2 EP 1083770A2
Authority
EP
European Patent Office
Prior art keywords
sound transducer
transducer according
disc
frame
sound
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.)
Withdrawn
Application number
EP00117691A
Other languages
German (de)
English (en)
Other versions
EP1083770A3 (fr
Inventor
Wolfgang Prof. Dr. Bachmann
Gerhard Dr. 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 Becker Automotive 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 EP1083770A2 publication Critical patent/EP1083770A2/fr
Publication of EP1083770A3 publication Critical patent/EP1083770A3/fr
Withdrawn legal-status Critical Current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

Definitions

  • the invention relates to a sound transducer, which consists of a transparent disc mounted in a frame and at least one in vibration connection with the disc standing driver.
  • This transparent sound transducer is used as a window, e.g. B. Shop window or building window, either as a transparent one Can be used as a microphone or as a transparent speaker.
  • Such a transparent sound transducer is in DE 26 12 450 A1 described, which consists of a massive window pane on which a driver is glued. With this driver can the window pane z. B. for music or Speech reproduction can be vibrated.
  • Window glass has also been proposed with WO 96/35313 and similar materials with the help of glued, piezoelectric or electrostatic converter for the purpose of To set sound radiation in vibration.
  • the present invention has for its object a Propose transducers of the disadvantages outlined does not have.
  • a low-damping storage can be according to the proposal Claim 4 with fastening elements designed as cushion elements realize with which the pane in the frame is so articulated that bending vibrations are absorbed as little as possible.
  • these cushion elements made of rubber-elastic Foam, so-called foam rubber, exist with which the pane on one or both sides in the frame below Tension is maintained.
  • spring tongues spring-hard metal sheet e.g. B. spring steel, brass or Aluminum
  • vibration-resistant, spring-elastic plastic e.g. B. made of fiber-reinforced synthetic resin.
  • a sandwich-like disc is proposed as a multi-resonance sound plate, the cover sheets on both sides of which are made of a material that has a high expansion shaft speed of preferably more than 3,000 m / s and the core has a cell structure and consists of a material with a low mass density, preferably less than 40kg / m 3 .
  • the bearing forces to absorb and maintain long-term stability is according to Claim 11 proposed the frame at least partially made of resiliently connected wooden sections, Manufacture metal or plastic. These profile frame parts can run around the entire disc or just extend over part of the edge of the pane.
  • the problem of low radiation efficiency is due to use the multi-resonance sound plate according to claim 1 preferably solved with the dimensioning according to claim 12.
  • the claims 13 and 14 cores proposed which consists of many, homogeneous, transparent cells exist.
  • the cells are matrix-like, orthogonal to each other Rows and columns arranged in a regular way.
  • the point of view of this quasi-transparent slices is through the cell walls, in particular if they are made of opaque material limited, this can be used for many areas of application Limitation however over the advantage of the acoustic Accept functionality.
  • Different design options for the cell structures and materials are included claims 14 and 15 indicated.
  • the cells can be closed-walled, for example, triangular, quadrangular, hexagonal in cross section, diamond or circular.
  • the cells can also have open walls be, the cell walls in shape by small spacers of balls, cubes, grains, by glued or melted, crossed threads made of glass, plastic, metal or also through gluing, welding or merging points against each other or against the cover pages are set.
  • the cover sheets consist of homogeneous, crystal clear material with smooth surface and are with the Core is vibration-proof connected on all contact surfaces, preferably glued or welded. Suitable as a material thin glass or acrylic glass.
  • Such converters can e.g. B. for laser rear projections use.
  • Drivers with seismic are suitable as electromechanical transducers Mass and vibration-proof, distortion-free contact preferably in the form of known piezoelectric flexural vibrators or electrodynamic vibrator, preferably with rare earth magnets. These drivers can either be floating arranged on the pane or supported against the frame, preferably glued on.
  • the sound transducer according to the invention is suitable for an abundance of applications. So he can according to claim 22 either as a speaker, e.g. B. also for conference desks and Isolation cabins, or used according to claim 2 as a microphone become.
  • This converter is particularly suitable according to claim 24 for televisions with flat screens, the disc even used for laser projection or with an LCD screen is combined.
  • the converter can be advantageously used as an architectural element, e.g. B. as a building window or Glass roof, insert, using either the transducer either Speech or music reproduction realized or sound to Noise cancellation purposes is generated.
  • transducer can be made according to the claims 26 and 27 according to the proposal according to DE-OS 26 12 450 Shop windows, showcases or for other advertising facilities deploy.
  • a window sound converter essentially has a sandwich-like disc 10 with cover sheets 11 and 12 and a core 13. Both the cover pages 11 and 12 as well as the light, shear-resistant core 13 consist of transparent material.
  • the core 13 consists of three superimposed cell layers, their cell walls perpendicular to each other and parallel or perpendicular to the Cover sheets 11, 12 run.
  • the disc 10 is arranged in a frame 14 and either with weakly damping, relatively compliant upholstery elements 15 or stored with relatively hard spring tongues 16.
  • a driver 16 for conversion electrical signals in mechanical vibrations or Conversion of mechanical vibrations into electrical signals intended.
  • This driver can either be from a not shown Signal source are fed. In this case it works the window sound converter as a loudspeaker.
  • the driver can however, also the vibrations picked up by the disk 10 convert into electrical signals through an amplifier be fed to a loudspeaker. In this case the Window sound converter as a microphone.
  • the disk 10 can basically be solid. Prefers is, however, the sandwich construction indicated in Fig. 1.
  • Fig. 2.1 shows a nucleus, the cells 20 of which are vertical and parallel cell walls 21 and 22 running to the side walls exhibit.
  • vertical cell walls 50 inevitably lead to a disability the view, since the viewing angle ⁇ is restricted. While the cover pages 51 and 52 expediently transparent material, if necessary the vertical cell walls 50 also made of opaque Materials exist.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
EP00117691A 1999-09-09 2000-08-17 Transducteur acoustique Withdrawn EP1083770A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1999143084 DE19943084A1 (de) 1999-09-09 1999-09-09 Schallwandler
DE19943084 1999-09-09

Publications (2)

Publication Number Publication Date
EP1083770A2 true EP1083770A2 (fr) 2001-03-14
EP1083770A3 EP1083770A3 (fr) 2005-12-07

Family

ID=7921347

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00117691A Withdrawn EP1083770A3 (fr) 1999-09-09 2000-08-17 Transducteur acoustique

Country Status (2)

Country Link
EP (1) EP1083770A3 (fr)
DE (1) DE19943084A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1274272A1 (fr) * 2001-06-19 2003-01-08 Chao-Hsien Lin Application d'un haut-parleur invisible et procédé pour sa fabrication
EP1385354A1 (fr) * 2002-07-25 2004-01-28 Kam, Tai-Yan Haut-parleur transparent en forme de panneau

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10154915B4 (de) * 2001-11-08 2005-02-03 Harman/Becker Automotive Systems Gmbh (Harman Division) Flachlautsprecheranordnung
DE10164509A1 (de) * 2001-12-28 2003-07-17 Webasto Vehicle Sys Int Gmbh Lautsprechersystem für die Audioanlage eines Kraftfahrzeuges
US6957516B2 (en) 2002-12-03 2005-10-25 Smart Skin, Inc. Acoustically intelligent windows

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612450A1 (de) * 1976-03-24 1977-10-06 Reditune Thordsen Gmbh & Co Anordnung zur abgabe von akustischen signalen, insbesondere an werbeflaechen und schaukaesten oder -fenstern
DE3832616A1 (de) * 1988-09-26 1990-03-29 Electronic Werke Deutschland Lautsprecher
WO1997009698A1 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Distributeur automatique

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69106712T2 (de) * 1990-08-04 1995-06-08 Secr Defence Brit Paneelförmiger lautsprecher.
NL1000275C2 (nl) * 1995-05-02 1996-11-05 Hollandse Signaalapparaten Bv Acoustische trillingsgenerator.
DE69602204T2 (de) * 1995-09-02 1999-09-16 New Transducers Ltd PANEELFöRMIGE MIKROFONE
DE19757098C2 (de) * 1997-12-20 2003-01-09 Harman Audio Electronic Sys Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2612450A1 (de) * 1976-03-24 1977-10-06 Reditune Thordsen Gmbh & Co Anordnung zur abgabe von akustischen signalen, insbesondere an werbeflaechen und schaukaesten oder -fenstern
DE3832616A1 (de) * 1988-09-26 1990-03-29 Electronic Werke Deutschland Lautsprecher
WO1997009698A1 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Distributeur automatique

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1274272A1 (fr) * 2001-06-19 2003-01-08 Chao-Hsien Lin Application d'un haut-parleur invisible et procédé pour sa fabrication
EP1385354A1 (fr) * 2002-07-25 2004-01-28 Kam, Tai-Yan Haut-parleur transparent en forme de panneau

Also Published As

Publication number Publication date
EP1083770A3 (fr) 2005-12-07
DE19943084A1 (de) 2001-04-05

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