EP0065882A2 - Membranes en forme de calotte pour haut-parleurs - Google Patents

Membranes en forme de calotte pour haut-parleurs Download PDF

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Publication number
EP0065882A2
EP0065882A2 EP82302711A EP82302711A EP0065882A2 EP 0065882 A2 EP0065882 A2 EP 0065882A2 EP 82302711 A EP82302711 A EP 82302711A EP 82302711 A EP82302711 A EP 82302711A EP 0065882 A2 EP0065882 A2 EP 0065882A2
Authority
EP
European Patent Office
Prior art keywords
dome
metal
radiating
layers
alloy
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Withdrawn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
EP82302711A
Other languages
German (de)
English (en)
Other versions
EP0065882A3 (fr
Inventor
Boaz Eliele
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.)
CELESTION INTERNATIONAL Ltd
Original Assignee
CELESTION INTERNATIONAL Ltd
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 CELESTION INTERNATIONAL Ltd filed Critical CELESTION INTERNATIONAL Ltd
Publication of EP0065882A2 publication Critical patent/EP0065882A2/fr
Publication of EP0065882A3 publication Critical patent/EP0065882A3/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Withdrawn legal-status Critical Current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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/127—Non-planar diaphragms or cones dome-shaped

Definitions

  • This invention relates to radiating domes as used in loudspeakers and loudspeaker systems, and is particularly concerned with radiating domes for use in high frequency loudspeakers.
  • radiating domes used as the vibrating element in loudspeakers have been made out of soft materials, for example impregnated cloth or plastics materials, or metals, for example aluminium or titanium.
  • soft materials for example impregnated cloth or plastics materials
  • metals for example aluminium or titanium.
  • Each of these types of dome can be made in various ways. Mechanical forming by pressing or drawing into shape has been used, and more recently a variety of metal deposition techniques have been developed.
  • a radiating metal dome for use in loudspeakers and loudspeaker systems which is made out of one or more of the metals selected from the group copper, silver and gold, or out of an alloy of copper, silver or gold with additions not sufficient substantially to reduce the thermal conductivity.
  • a radiating metal dome for use in loudspeakers and loudspeaker systems which comprises a plurality of layers, at least one of which is a layer of a metal or a metal alloy, in intimate contact.
  • the metals or metal alloys in the multiple layer construction are selected from or based upon the group copper, silver and gold.
  • the radiating dome shown in Fig. 1 comprises two layers 10 and 12 which are in intimate contact with each other to form the complete dome structure.
  • Each layer 10, 12 is made of a metal or metal alloy.
  • the material of at least one of the layers, and preferably of both layers, is copper, silver or gold, or an alloy based upon copper, silver or gold with additions which are not sufficient substantially to reduce the, thermal conductivity of the material. If one of the layers lO, 12 is made of such a metal or metal alloy, then the other layer may be made of some other metal or metal alloy, for example bronze, being either a copper/tin alloy or a copper/aluminium alloy.
  • thermal conductivities of the metals copper, silver and gold are given below, and, for comparison purposes, the list includes the thermal conductivity of aluminium.
  • the dome itself is integral with a cylindrical extension which is made of the same materials and at the same time as the dome and which carries a surrounding coil 14.
  • This cylindrical coil bobbin is provided with an outwardly projecting circumferential flange 16 which serves as a support or seat for the coil 14.
  • Fig. 1 represents the construction of a double-layer metal dome
  • the invention also includes a single-layer dome made from copper, silver or gold, or from an alloy of copper, silver or gold with additions not sufficient substantially to reduce the thermal conductivity.
  • the preferred overall thickness of the dome is . from 0.05 to 0.1 mm.
  • the construction of such a dome can be achieved using any suitable metal deposition technique, for example vacuum deposition, electrodeposition, RF sputtering, etcetera.
  • Fig. 2 shows an alternative embodiment of radiating dome which again includes the two metal or metal alloy layers 10 and 12.
  • the two layers are separated by a filler layer 18 which is continuous with the layers lO and 12.
  • This filler layer 18 can be non-metallic, for example of a synthetic plastics material, or a rubber material for example.
  • This sandwich construction with a filler can produce improved mechanical properties for the dome.
  • the dome is not provided with an integral circumferential flange to support the coil 14.
  • the coil 14 is secured in place by any suitable conventional means.
  • Fig. 3 shows an alternative embodiment in which the dome comprises a single metal layer 10, of a material as specified above, which is protected on both sides by a coating layer 20a, 20b.
  • the coating layer is shown as being provided on both sides of the metallic layer 10, it can alternatively be provided on one face only of the dome.
  • the coating layer or layers 20a, 20b perform a protective function, and may suitably be made of a non-metallic material.
  • an acoustic damping material may be provided on one or both sides of the dome in any of the embodiments described above.

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Laminated Bodies (AREA)
EP82302711A 1981-05-26 1982-05-26 Membranes en forme de calotte pour haut-parleurs Withdrawn EP0065882A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB8116062 1981-05-26
GB8116062 1981-05-26

Publications (2)

Publication Number Publication Date
EP0065882A2 true EP0065882A2 (fr) 1982-12-01
EP0065882A3 EP0065882A3 (fr) 1983-12-21

Family

ID=10522061

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82302711A Withdrawn EP0065882A3 (fr) 1981-05-26 1982-05-26 Membranes en forme de calotte pour haut-parleurs

Country Status (2)

Country Link
EP (1) EP0065882A3 (fr)
GB (1) GB2099660A (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4122367A1 (de) * 1991-01-14 1992-07-16 Pioneer Electronic Corp Kalottenlautsprecher
EP0344975B2 (fr) † 1988-06-02 2001-11-07 Boaz Elieli Transducteur électro-acoustique et haut-parleur
US6792127B1 (en) 1999-10-29 2004-09-14 Kef Audio (Uk) Limited Elliptical dome for high frequency transducer
EP1711032A2 (fr) * 2005-04-05 2006-10-11 Sony Corporation Plaque acoustique vibrante
WO2008011435A3 (fr) * 2006-07-17 2008-05-22 Burton A Babb Haut-parleur haute fidélité
CN111031415A (zh) * 2019-11-22 2020-04-17 歌尔股份有限公司 扬声器模组及电子装置

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2155731A (en) * 1983-11-01 1985-09-25 John David Gregson Ultrasonic transducers
GB8603645D0 (en) * 1986-02-14 1986-03-19 Celestion Int Ltd Loudspeakers
US5259036A (en) * 1991-07-22 1993-11-02 Shure Brothers, Inc. Diaphragm for dynamic microphones and methods of manufacturing the same
JPH09327087A (ja) * 1996-06-06 1997-12-16 Matsushita Electric Ind Co Ltd ダブルコーンスピーカ

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR653019A (fr) * 1928-04-18 1929-03-15 Membrane acoustique
US3991286A (en) * 1975-06-02 1976-11-09 Altec Corporation Heat dissipating device for loudspeaker voice coil
US4135601A (en) * 1975-06-24 1979-01-23 Pioneer Electronic Corporation Boron coated diaphragm for use in a loud speaker
US4140203A (en) * 1976-05-17 1979-02-20 Matsushita Electric Industrial Co., Ltd. Acoustic diaphragm with polyurethane elastomer coating

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0344975B2 (fr) † 1988-06-02 2001-11-07 Boaz Elieli Transducteur électro-acoustique et haut-parleur
DE4122367A1 (de) * 1991-01-14 1992-07-16 Pioneer Electronic Corp Kalottenlautsprecher
US6792127B1 (en) 1999-10-29 2004-09-14 Kef Audio (Uk) Limited Elliptical dome for high frequency transducer
EP1711032A2 (fr) * 2005-04-05 2006-10-11 Sony Corporation Plaque acoustique vibrante
WO2008011435A3 (fr) * 2006-07-17 2008-05-22 Burton A Babb Haut-parleur haute fidélité
US7529382B2 (en) * 2006-07-17 2009-05-05 Burton A. Babb High fidelity loudspeaker
CN111031415A (zh) * 2019-11-22 2020-04-17 歌尔股份有限公司 扬声器模组及电子装置
WO2021098529A1 (fr) * 2019-11-22 2021-05-27 歌尔股份有限公司 Module de haut-parleur et dispositif électronique

Also Published As

Publication number Publication date
GB2099660A (en) 1982-12-08
EP0065882A3 (fr) 1983-12-21

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Effective date: 19840822

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Inventor name: ELIELE, BOAZ