WO2001045458A3 - Acoustic devices - Google Patents

Acoustic devices Download PDF

Info

Publication number
WO2001045458A3
WO2001045458A3 PCT/GB2000/004718 GB0004718W WO0145458A3 WO 2001045458 A3 WO2001045458 A3 WO 2001045458A3 GB 0004718 W GB0004718 W GB 0004718W WO 0145458 A3 WO0145458 A3 WO 0145458A3
Authority
WO
WIPO (PCT)
Prior art keywords
panel
neutral plane
arrow
acoustic devices
displacement transducers
Prior art date
Application number
PCT/GB2000/004718
Other languages
French (fr)
Other versions
WO2001045458A2 (en
Inventor
Bijan Djahansouzi
Original Assignee
New Transducers Ltd
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, Bijan Djahansouzi filed Critical New Transducers Ltd
Priority to GB0206936A priority Critical patent/GB2370446A/en
Priority to AU21931/01A priority patent/AU2193101A/en
Publication of WO2001045458A2 publication Critical patent/WO2001045458A2/en
Publication of WO2001045458A3 publication Critical patent/WO2001045458A3/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

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Abstract

A panel-form bending wave loudspeaker comprising a panel (30) having a neutral plane (50) and a displacement transducer (46, 48) coupled to the panel at a position displaced from the neutral plane (50). A pair of such displacement transducers (46, 48) may be oppositely disposed about the neutral plane and may be embedded in the panel (30). The displacement transducers (46, 48) induce local bending in the panel by inducing extension (arrow A) and compression (arrow B) on either side of the neutral plane (50).
PCT/GB2000/004718 1999-12-16 2000-12-11 Acoustic devices WO2001045458A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB0206936A GB2370446A (en) 1999-12-16 2000-12-11 Acoustic devices
AU21931/01A AU2193101A (en) 1999-12-16 2000-12-11 Acoustic devices

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9929731.9 1999-12-16
GBGB9929731.9A GB9929731D0 (en) 1999-12-16 1999-12-16 Acoustic device

Publications (2)

Publication Number Publication Date
WO2001045458A2 WO2001045458A2 (en) 2001-06-21
WO2001045458A3 true WO2001045458A3 (en) 2004-02-19

Family

ID=10866430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/004718 WO2001045458A2 (en) 1999-12-16 2000-12-11 Acoustic devices

Country Status (3)

Country Link
AU (1) AU2193101A (en)
GB (2) GB9929731D0 (en)
WO (1) WO2001045458A2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7447322B2 (en) 2004-01-13 2008-11-04 Brookstone Purchasing, Inc. Speaker having a transparent panel
FR2918780B1 (en) * 2007-07-10 2010-04-16 Eads Europ Aeronautic Defence METHOD FOR PRODUCING AN ACTIVE ACOUSTIC PANEL AND NOISE MITIGATION DEVICE USING SUCH ACTIVE ACOUSTIC PANEL

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219712A (en) * 1988-06-10 1989-12-13 Murata Manufacturing Co Piezolectric speaker
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998042536A1 (en) * 1997-03-22 1998-10-01 New Transducers Limited Passenger vehicles incorporating loudspeakers comprising panel-form acoustic radiating elements
WO1999011490A1 (en) * 1997-09-03 1999-03-11 New Transducers Limited Trim panel comprising an integral acoustic system
WO1999012387A1 (en) * 1997-09-04 1999-03-11 New Transducers Limited Loudspeakers

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2219712A (en) * 1988-06-10 1989-12-13 Murata Manufacturing Co Piezolectric speaker
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998042536A1 (en) * 1997-03-22 1998-10-01 New Transducers Limited Passenger vehicles incorporating loudspeakers comprising panel-form acoustic radiating elements
WO1999011490A1 (en) * 1997-09-03 1999-03-11 New Transducers Limited Trim panel comprising an integral acoustic system
WO1999012387A1 (en) * 1997-09-04 1999-03-11 New Transducers Limited Loudspeakers

Also Published As

Publication number Publication date
WO2001045458A2 (en) 2001-06-21
GB0206936D0 (en) 2002-05-08
GB9929731D0 (en) 2000-02-09
AU2193101A (en) 2001-06-25
GB2370446A (en) 2002-06-26

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