WO2000078090A3 - Bending wave acoustic device - Google Patents

Bending wave acoustic device Download PDF

Info

Publication number
WO2000078090A3
WO2000078090A3 PCT/GB2000/002054 GB0002054W WO0078090A3 WO 2000078090 A3 WO2000078090 A3 WO 2000078090A3 GB 0002054 W GB0002054 W GB 0002054W WO 0078090 A3 WO0078090 A3 WO 0078090A3
Authority
WO
WIPO (PCT)
Prior art keywords
bending wave
acoustic device
length
wave acoustic
wave modes
Prior art date
Application number
PCT/GB2000/002054
Other languages
French (fr)
Other versions
WO2000078090A2 (en
Inventor
Graham Bank
Neil Harris
Original Assignee
New Transducers Ltd
Graham Bank
Neil Harris
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, Graham Bank, Neil Harris filed Critical New Transducers Ltd
Priority to JP2001502614A priority Critical patent/JP2003501982A/en
Priority to EP00935350A priority patent/EP1186203B1/en
Priority to DE60004045T priority patent/DE60004045T2/en
Priority to AU50896/00A priority patent/AU5089600A/en
Priority to NZ515328A priority patent/NZ515328A/en
Publication of WO2000078090A2 publication Critical patent/WO2000078090A2/en
Publication of WO2000078090A3 publication Critical patent/WO2000078090A3/en
Priority to HK02102096.7A priority patent/HK1040875B/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/32—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only
    • H04R1/40—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers
    • H04R1/403—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired directional characteristic only by combining a number of identical transducers loud-speakers
    • 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

Abstract

An acoustic device has a plurality of resonant bending wave modes along the length of a member (1). The fundamental frequency of resonant bending wave modes in directions perpendicular to the length is much higher, so that the lower frequency resonant bending wave modes are substantially one directional. A plurality of transducers (5) may be spaced across the width of the member (1) at a preferred position (3) along the length of the panel (1).
PCT/GB2000/002054 1999-06-10 2000-06-07 Bending wave acoustic device WO2000078090A2 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
JP2001502614A JP2003501982A (en) 1999-06-10 2000-06-07 Sound equipment
EP00935350A EP1186203B1 (en) 1999-06-10 2000-06-07 Bending wave acoustic device
DE60004045T DE60004045T2 (en) 1999-06-10 2000-06-07 BENDING SHAFT ACOUSTIC DEVICE
AU50896/00A AU5089600A (en) 1999-06-10 2000-06-07 Acoustic device
NZ515328A NZ515328A (en) 1999-06-10 2000-06-07 Acoustic device having a member supporting resonant bending wave modes and having a non-modal axis orthogonal to the modal axis
HK02102096.7A HK1040875B (en) 1999-06-10 2002-03-19 Bending wave acoustic device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9913465.2 1999-06-10
GBGB9913465.2A GB9913465D0 (en) 1999-06-10 1999-06-10 Acoustic device

Publications (2)

Publication Number Publication Date
WO2000078090A2 WO2000078090A2 (en) 2000-12-21
WO2000078090A3 true WO2000078090A3 (en) 2001-07-12

Family

ID=10855054

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/002054 WO2000078090A2 (en) 1999-06-10 2000-06-07 Bending wave acoustic device

Country Status (10)

Country Link
EP (1) EP1186203B1 (en)
JP (1) JP2003501982A (en)
CN (1) CN1261002C (en)
AU (1) AU5089600A (en)
DE (1) DE60004045T2 (en)
GB (1) GB9913465D0 (en)
HK (1) HK1040875B (en)
NZ (1) NZ515328A (en)
TW (1) TW479434B (en)
WO (1) WO2000078090A2 (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7120263B2 (en) 2001-03-23 2006-10-10 New Transducers Limited Bending wave acoustic radiator
GB2386790B (en) * 2001-03-23 2004-08-18 New Transducers Ltd Bending wave acoustic radiator
GB0123932D0 (en) * 2001-10-05 2001-11-28 New Transducers Ltd Loudspeakers
GB0317331D0 (en) 2003-07-24 2003-08-27 New Transducers Ltd Acoustic device
JP5545083B2 (en) * 2010-07-07 2014-07-09 ソニー株式会社 Speaker device
JP6720148B2 (en) * 2014-09-19 2020-07-08 コーニング インコーポレイテッド Thin panel loudspeaker

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347335A (en) * 1965-04-05 1967-10-17 Bolt Beranek & Newman Acoustic-wave apparatus
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1999041939A1 (en) * 1998-02-10 1999-08-19 New Transducers Limited Acoustic device comprising a panel member relying on bending wave action

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3347335A (en) * 1965-04-05 1967-10-17 Bolt Beranek & Newman Acoustic-wave apparatus
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1999041939A1 (en) * 1998-02-10 1999-08-19 New Transducers Limited Acoustic device comprising a panel member relying on bending wave action

Also Published As

Publication number Publication date
CN1261002C (en) 2006-06-21
NZ515328A (en) 2002-04-26
DE60004045D1 (en) 2003-08-28
EP1186203A2 (en) 2002-03-13
AU5089600A (en) 2001-01-02
TW479434B (en) 2002-03-11
EP1186203B1 (en) 2003-07-23
GB9913465D0 (en) 1999-08-11
HK1040875B (en) 2003-10-17
CN1356015A (en) 2002-06-26
WO2000078090A2 (en) 2000-12-21
JP2003501982A (en) 2003-01-14
DE60004045T2 (en) 2004-05-06
HK1040875A1 (en) 2002-06-21

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