WO2002045460A3 - Loudspeakers - Google Patents

Loudspeakers Download PDF

Info

Publication number
WO2002045460A3
WO2002045460A3 PCT/GB2001/005014 GB0105014W WO0245460A3 WO 2002045460 A3 WO2002045460 A3 WO 2002045460A3 GB 0105014 W GB0105014 W GB 0105014W WO 0245460 A3 WO0245460 A3 WO 0245460A3
Authority
WO
WIPO (PCT)
Prior art keywords
acoustic member
bending wave
voice coil
acoustic
loudspeaker
Prior art date
Application number
PCT/GB2001/005014
Other languages
French (fr)
Other versions
WO2002045460A2 (en
Inventor
Christien Ellis
Nicholas Patrick Roland Hill
Original Assignee
New Transducers Ltd
Christien Ellis
Nicholas Patrick Roland Hill
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, Christien Ellis, Nicholas Patrick Roland Hill filed Critical New Transducers Ltd
Priority to MXPA03004732A priority Critical patent/MXPA03004732A/en
Priority to DE60132357T priority patent/DE60132357T2/en
Priority to AU2002223800A priority patent/AU2002223800A1/en
Priority to EP01999128A priority patent/EP1340407B1/en
Priority to JP2002546462A priority patent/JP2004515178A/en
Priority to BR0115753-1A priority patent/BR0115753A/en
Publication of WO2002045460A2 publication Critical patent/WO2002045460A2/en
Publication of WO2002045460A3 publication Critical patent/WO2002045460A3/en
Priority to HK03106699.8A priority patent/HK1054483A1/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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

A loudspeaker comprising a panel-form acoustic member intended for operation as a bending wave radiator and an electrodynamic moving coil transducer having a voice coil mounted to the acoustic member to excite bending wave vibration in the acoustic member, wherein the junction between the voice coil and the acoustic member is of sufficient length in relation to the size of the acoustic member to represent a line drive such that the acoustic member has a mechanical impedance which has a rising trend with bending wave frequency.
PCT/GB2001/005014 2000-11-30 2001-11-14 Loudspeakers WO2002045460A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
MXPA03004732A MXPA03004732A (en) 2000-11-30 2001-11-14 Loudspeakers.
DE60132357T DE60132357T2 (en) 2000-11-30 2001-11-14 SPEAKER
AU2002223800A AU2002223800A1 (en) 2000-11-30 2001-11-14 Loudspeakers
EP01999128A EP1340407B1 (en) 2000-11-30 2001-11-14 Loudspeakers
JP2002546462A JP2004515178A (en) 2000-11-30 2001-11-14 Loudspeaker
BR0115753-1A BR0115753A (en) 2000-11-30 2001-11-14 Loudspeakers
HK03106699.8A HK1054483A1 (en) 2000-11-30 2003-09-18 Loudspeakers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB0029098.1A GB0029098D0 (en) 2000-11-30 2000-11-30 Vibration transducer
GB0029098.1 2000-11-30

Publications (2)

Publication Number Publication Date
WO2002045460A2 WO2002045460A2 (en) 2002-06-06
WO2002045460A3 true WO2002045460A3 (en) 2003-03-13

Family

ID=9904101

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/005014 WO2002045460A2 (en) 2000-11-30 2001-11-14 Loudspeakers

Country Status (13)

Country Link
EP (1) EP1340407B1 (en)
JP (1) JP2004515178A (en)
CN (1) CN100433937C (en)
AR (1) AR031425A1 (en)
AU (1) AU2002223800A1 (en)
BR (1) BR0115753A (en)
CZ (1) CZ20031501A3 (en)
DE (1) DE60132357T2 (en)
GB (1) GB0029098D0 (en)
HK (1) HK1054483A1 (en)
MX (1) MXPA03004732A (en)
TW (1) TW515220B (en)
WO (1) WO2002045460A2 (en)

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060153406A1 (en) * 2003-03-07 2006-07-13 Koninklijke Phlips Electronics N.V. Bending wave loudspeaker
BRPI0509913A (en) 2004-04-16 2007-09-18 New Transducers Ltd acoustic device and method for manufacturing the acoustic device
WO2006035413A1 (en) * 2004-09-30 2006-04-06 Pss Belgium N.V. Loudspeaker with an acoustic membrane
GB0510484D0 (en) * 2005-05-24 2005-06-29 New Transducers Ltd Acoustic device
JP2009260763A (en) * 2008-04-18 2009-11-05 Panasonic Corp Flat speaker
EP2141939B1 (en) * 2008-07-02 2016-11-09 Renault SAS Mandrel for a coil transducer motor structure
EP2417776A1 (en) * 2009-04-10 2012-02-15 Immerz Inc. Systems and methods for acousto-haptic speakers
GB2478160B (en) 2010-02-26 2014-05-28 Pss Belgium Nv Mass loading for piston loudspeakers
GB2503423A (en) * 2012-05-11 2014-01-01 Deben Acoustics Balanced-mode radiator with multiple voice coil assembly
CN107113509A (en) * 2014-12-26 2017-08-29 索尼公司 Loudspeaker apparatus
GB2549078A (en) * 2016-03-29 2017-10-11 Avid Hifi Ltd Improvements to loudspeaker drive unit performance
DE102017002217B4 (en) 2017-03-08 2022-11-10 L & B Lautsprecher und Beschallungstechnik GmbH Area radiator with specified edge distance distribution
GB2574591B (en) * 2018-06-07 2020-10-28 Amina Tech Limited Product with integrally formed vibrating panel loudspeaker
CN116663200B (en) * 2023-07-25 2023-10-20 中国航发四川燃气涡轮研究院 Method and device for screening blades of integral impeller of compressor with controllable frequency dispersion

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009846A1 (en) * 1995-09-02 1997-03-13 New Transducers Limited Panel-form loudspeakers
WO1998039947A1 (en) * 1997-03-04 1998-09-11 New Transducers Limited Acoustic device
EP0969691A1 (en) * 1998-01-16 2000-01-05 Sony Corporation Speaker and electronic apparatus using speaker
WO2000033612A2 (en) * 1998-11-30 2000-06-08 New Transducers Limited Bending wave acoustic devices
WO2000065869A2 (en) * 1999-04-27 2000-11-02 New Transducers Limited Bending-wave panel loudspeakers
WO2001005189A2 (en) * 1999-07-08 2001-01-18 New Transducers Limited Bending wave panel speaker and method of driving such a speaker
WO2001047320A1 (en) * 1999-12-21 2001-06-28 New Transducers Limited Loudspeakers

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009846A1 (en) * 1995-09-02 1997-03-13 New Transducers Limited Panel-form loudspeakers
WO1998039947A1 (en) * 1997-03-04 1998-09-11 New Transducers Limited Acoustic device
EP0969691A1 (en) * 1998-01-16 2000-01-05 Sony Corporation Speaker and electronic apparatus using speaker
WO2000033612A2 (en) * 1998-11-30 2000-06-08 New Transducers Limited Bending wave acoustic devices
WO2000065869A2 (en) * 1999-04-27 2000-11-02 New Transducers Limited Bending-wave panel loudspeakers
WO2001005189A2 (en) * 1999-07-08 2001-01-18 New Transducers Limited Bending wave panel speaker and method of driving such a speaker
WO2001047320A1 (en) * 1999-12-21 2001-06-28 New Transducers Limited Loudspeakers

Also Published As

Publication number Publication date
DE60132357T2 (en) 2008-12-24
WO2002045460A2 (en) 2002-06-06
CN100433937C (en) 2008-11-12
AR031425A1 (en) 2003-09-24
GB0029098D0 (en) 2001-01-10
BR0115753A (en) 2004-07-06
DE60132357D1 (en) 2008-02-21
CN1554209A (en) 2004-12-08
TW515220B (en) 2002-12-21
HK1054483A1 (en) 2003-11-28
AU2002223800A1 (en) 2002-06-11
EP1340407B1 (en) 2008-01-09
CZ20031501A3 (en) 2003-08-13
JP2004515178A (en) 2004-05-20
MXPA03004732A (en) 2004-05-04
EP1340407A2 (en) 2003-09-03

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