WO2000070909A3 - Bending wave acoustic device - Google Patents

Bending wave acoustic device Download PDF

Info

Publication number
WO2000070909A3
WO2000070909A3 PCT/GB2000/001751 GB0001751W WO0070909A3 WO 2000070909 A3 WO2000070909 A3 WO 2000070909A3 GB 0001751 W GB0001751 W GB 0001751W WO 0070909 A3 WO0070909 A3 WO 0070909A3
Authority
WO
WIPO (PCT)
Prior art keywords
modes
group
acoustic device
bending wave
wave acoustic
Prior art date
Application number
PCT/GB2000/001751
Other languages
French (fr)
Other versions
WO2000070909A2 (en
Inventor
Henry Azima
Neil Harris
Bijan Djahansouzi
Original Assignee
New Transducers Ltd
Henry Azima
Neil Harris
Bijan Djahansouzi
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, Neil Harris, Bijan Djahansouzi filed Critical New Transducers Ltd
Priority to NZ514593A priority Critical patent/NZ514593A/en
Priority to IL14598500A priority patent/IL145985A0/en
Priority to JP2000619235A priority patent/JP2003500915A/en
Priority to EP00927539A priority patent/EP1179284A2/en
Priority to AU45933/00A priority patent/AU4593300A/en
Publication of WO2000070909A2 publication Critical patent/WO2000070909A2/en
Publication of WO2000070909A3 publication Critical patent/WO2000070909A3/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

Abstract

An acoustic device (1) supports a plurality of groups of bending wave modes, such as a group of odd modes and a group of even modes. The modes of each group may be substantially orthogonal to each other. At least one transducer (3) is coupled to the panel to preferentially excite the modes of one group. A further transducer (5) may be provided to preferentially excite the modes of another group.
PCT/GB2000/001751 1999-05-15 2000-05-12 Bending wave acoustic device WO2000070909A2 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
NZ514593A NZ514593A (en) 1999-05-15 2000-05-12 Acoustic device with transducer coupling one of groups of modes of overlapping frequencies
IL14598500A IL145985A0 (en) 1999-05-15 2000-05-12 Bending wave acoustic device
JP2000619235A JP2003500915A (en) 1999-05-15 2000-05-12 Sound equipment
EP00927539A EP1179284A2 (en) 1999-05-15 2000-05-12 Bending wave acoustic device
AU45933/00A AU4593300A (en) 1999-05-15 2000-05-12 Acoustic device

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9911271.6A GB9911271D0 (en) 1999-05-15 1999-05-15 Acoustic device
GB9911271.6 1999-05-15

Publications (2)

Publication Number Publication Date
WO2000070909A2 WO2000070909A2 (en) 2000-11-23
WO2000070909A3 true WO2000070909A3 (en) 2001-02-15

Family

ID=10853496

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/001751 WO2000070909A2 (en) 1999-05-15 2000-05-12 Bending wave acoustic device

Country Status (9)

Country Link
EP (1) EP1179284A2 (en)
JP (1) JP2003500915A (en)
CN (1) CN1350765A (en)
AU (1) AU4593300A (en)
GB (1) GB9911271D0 (en)
IL (1) IL145985A0 (en)
NZ (1) NZ514593A (en)
TW (1) TW479438B (en)
WO (1) WO2000070909A2 (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1264511A1 (en) * 2001-01-26 2002-12-11 Harman Audio Electronic Systems GmbH Flat-panel loudspeaker
US7120263B2 (en) 2001-03-23 2006-10-10 New Transducers Limited Bending wave acoustic radiator
CN100551133C (en) * 2001-03-23 2009-10-14 新型转换器有限公司 Bending wave acoustic radiator
JP2008509587A (en) * 2004-08-06 2008-03-27 コーニンクレッカ フィリップス エレクトロニクス エヌ ヴィ Panel acoustic transducer and actuator for generating and / or recording sound having an actuator for operating the panel
GB0601076D0 (en) 2006-01-19 2006-03-01 New Transducers Ltd Acoustic device and method of making acoustic device
US7983432B2 (en) * 2006-09-29 2011-07-19 Shure Acquisition Holdings, Inc. Point excitation placement in an audio transducer
WO2014024736A1 (en) * 2012-08-10 2014-02-13 京セラ株式会社 Sound generator, sound generation device, and electronic device

Citations (4)

* 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
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998034320A2 (en) * 1997-01-31 1998-08-06 New Transducers Limited Electro-dynamic inertial vibration exciter
WO1999002012A1 (en) * 1997-07-03 1999-01-14 New Transducers Limited Panel-form loudspeakers

Patent Citations (4)

* 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
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998034320A2 (en) * 1997-01-31 1998-08-06 New Transducers Limited Electro-dynamic inertial vibration exciter
WO1999002012A1 (en) * 1997-07-03 1999-01-14 New Transducers Limited Panel-form loudspeakers

Also Published As

Publication number Publication date
JP2003500915A (en) 2003-01-07
IL145985A0 (en) 2002-07-25
TW479438B (en) 2002-03-11
WO2000070909A2 (en) 2000-11-23
EP1179284A2 (en) 2002-02-13
NZ514593A (en) 2002-09-27
CN1350765A (en) 2002-05-22
GB9911271D0 (en) 1999-07-14
AU4593300A (en) 2000-12-05

Similar Documents

Publication Publication Date Title
TW428415B (en) Panel-form loudspeakers
DK0847665T3 (en) Panel-shaped speakers
BG103669A (en) Acoustic device
WO1998052381A3 (en) Panel-form loudspeakers
HK1034407A1 (en) Panel form acoustic apparatus using bending waves modes
HK1029247A1 (en) Active acoustic devices comprising panel members.
CA2440094A1 (en) Structural reinforcement member and method of use therefor
AU5013396A (en) Frequency multiplying piezoelectric generators
AU5647696A (en) Acoustic vibration generator
AU2001243252A1 (en) Acoustic transducer with improved acoustic damper
AU6776100A (en) Electroacoustic transducer with diaphragm securing structure and method
WO2001087002A3 (en) Loudspeaker having an acoustic panel and an electrical driver
DE69730789D1 (en) Piezoelectric electroacoustic transducer
GB2282297B (en) Improved resonant acoustic emission transducer
WO2000070909A3 (en) Bending wave acoustic device
WO2001005189A3 (en) Bending wave panel speaker and method of driving such a speaker
WO2002082855A3 (en) Loudspeaker
EP1100288A3 (en) Acoustic radiator
WO2002013575A8 (en) Bending wave loudspeaker
WO2001003467A3 (en) Bending wave acoustic device
WO2000078090A3 (en) Bending wave acoustic device
WO2001018132A3 (en) Panel-shaped loudspeaker
WO2000079833A3 (en) Distributed mode acoustic device
WO2001045458A3 (en) Acoustic devices
WO2003013180A3 (en) Acoustic device

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 00807604.9

Country of ref document: CN

AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY CA CH CN CR CU CZ DE DK DM DZ EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG

WWE Wipo information: entry into national phase

Ref document number: 2000927539

Country of ref document: EP

WWE Wipo information: entry into national phase

Ref document number: 514593

Country of ref document: NZ

Ref document number: IN/PCT/2001/1029/KOL

Country of ref document: IN

ENP Entry into the national phase

Ref document number: 2000 619235

Country of ref document: JP

Kind code of ref document: A

WWP Wipo information: published in national office

Ref document number: 2000927539

Country of ref document: EP

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

WWW Wipo information: withdrawn in national office

Ref document number: 2000927539

Country of ref document: EP

DPE2 Request for preliminary examination filed before expiration of 19th month from priority date (pct application filed from 20040101)