WO2002013575A8 - Bending wave loudspeaker - Google Patents

Bending wave loudspeaker

Info

Publication number
WO2002013575A8
WO2002013575A8 PCT/GB2001/003353 GB0103353W WO0213575A8 WO 2002013575 A8 WO2002013575 A8 WO 2002013575A8 GB 0103353 W GB0103353 W GB 0103353W WO 0213575 A8 WO0213575 A8 WO 0213575A8
Authority
WO
WIPO (PCT)
Prior art keywords
panel
frequency
loudspeaker
waves
bending wave
Prior art date
Application number
PCT/GB2001/003353
Other languages
French (fr)
Other versions
WO2002013575A1 (en
Inventor
Henry Azima
Original Assignee
New Transducers Ltd
Henry Azima
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 New Transducers Ltd, Henry Azima filed Critical New Transducers Ltd
Priority to EP01953210A priority Critical patent/EP1305976A1/en
Priority to JP2002518122A priority patent/JP2004506360A/en
Priority to AU2001275706A priority patent/AU2001275706A1/en
Publication of WO2002013575A1 publication Critical patent/WO2002013575A1/en
Publication of WO2002013575A8 publication Critical patent/WO2002013575A8/en

Links

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
    • H04R7/16—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
    • H04R2440/00—Bending wave transducers covered by H04R, not provided for in its groups
    • H04R2440/01—Acoustic transducers using travelling bending waves to generate or detect sound
    • 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
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands

Abstract

A loudspeaker comprising a panel which is sufficiently stiff to support bending waves, the panel having a boundary, a transducer mounted to the panel to apply bending wave energy in the form of dispensive travelling waves thereto at a first location in response to an electrical signal applied to the transducer to cause the panel to vibrate and radiate an acoustic output, the loudspeaker having a frequency range extending from a lower frequency to a higher frequency and the panel having a stiffness giving a coincidence frequency above the lower frequency, and comprising means on or associated with the panel at a second location to attenuate travelling bending waves in the panel to prevent or at least substantially to moderate panel resonance.
PCT/GB2001/003353 2000-08-03 2001-07-27 Bending wave loudspeaker WO2002013575A1 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP01953210A EP1305976A1 (en) 2000-08-03 2001-07-27 Recovery of metals by incineration of metal containing basic ion exchange resin
JP2002518122A JP2004506360A (en) 2000-08-03 2001-07-27 Bending wave loudspeaker
AU2001275706A AU2001275706A1 (en) 2000-08-03 2001-07-27 Bending wave loudspeaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0018996.9 2000-08-03
GB0018996A GB0018996D0 (en) 2000-08-03 2000-08-03 Bending wave loudspeaker

Publications (2)

Publication Number Publication Date
WO2002013575A1 WO2002013575A1 (en) 2002-02-14
WO2002013575A8 true WO2002013575A8 (en) 2004-12-29

Family

ID=9896856

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003353 WO2002013575A1 (en) 2000-08-03 2001-07-27 Bending wave loudspeaker

Country Status (7)

Country Link
EP (1) EP1305976A1 (en)
JP (1) JP2004506360A (en)
CN (1) CN1470148A (en)
AU (1) AU2001275706A1 (en)
GB (1) GB0018996D0 (en)
TW (1) TW530518B (en)
WO (1) WO2002013575A1 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003226539A1 (en) * 2002-04-17 2003-11-03 New Transducers Limited Acoustic device
DE102004061314A1 (en) * 2004-12-20 2006-07-06 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Loudspeaker transmitter and method of making a loudspeaker diaphragm
EP1966102A1 (en) * 2005-12-07 2008-09-10 AGC Flat Glass Europe SA Sound-generating glazing
US8389120B2 (en) 2005-12-07 2013-03-05 Agc Glass Europe Sound-generating glazing
TWI384890B (en) * 2008-11-05 2013-02-01 Univ Nat Chiao Tung A performance measurement method and system for microspeakers
CH704062A2 (en) * 2010-11-09 2012-05-15 Montres Breguet Sa Anti-shock device for protecting balance spring of magnetic pivot of watch movement, has guiding or attraction units guiding or attracting ends, where units are movable along linear direction between abutments
CN108337621B (en) * 2018-02-26 2024-01-02 浙江中科电声研发中心 Method and system for measuring viscoelasticity of loudspeaker vibrating component material
BR112022012943A2 (en) * 2020-01-17 2022-09-13 Shenzhen Shokz Co Ltd MICROPHONE AND ELECTRONIC DEVICE CONTAINING THE SAME

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992003024A1 (en) 1990-08-04 1992-02-20 The Secretary Of State For Defence In Her Britannic Majesty's Government Of The United Kingdom Of Great Britain And Northern Ireland Panel-form loudspeaker
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
GB9806994D0 (en) * 1998-04-02 1998-06-03 New Transducers Ltd Acoustic device
DE19757098C2 (en) * 1997-12-20 2003-01-09 Harman Audio Electronic Sys Suspension for sound reproduction arrangements based on the bending wave principle
DE19821855A1 (en) 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Flat panel loudspeaker
CA2338713A1 (en) * 1998-07-29 2000-02-10 Graham Bank Loudspeaker drive unit having a resonant panel-form member

Also Published As

Publication number Publication date
EP1305976A1 (en) 2003-05-02
WO2002013575A1 (en) 2002-02-14
TW530518B (en) 2003-05-01
JP2004506360A (en) 2004-02-26
AU2001275706A1 (en) 2002-02-18
CN1470148A (en) 2004-01-21
GB0018996D0 (en) 2000-09-20

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