GB2370446A - Acoustic devices - Google Patents

Acoustic devices

Info

Publication number
GB2370446A
GB2370446A GB0206936A GB0206936A GB2370446A GB 2370446 A GB2370446 A GB 2370446A GB 0206936 A GB0206936 A GB 0206936A GB 0206936 A GB0206936 A GB 0206936A GB 2370446 A GB2370446 A GB 2370446A
Authority
GB
United Kingdom
Prior art keywords
panel
neutral plane
arrow
acoustic devices
displacement transducers
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
GB0206936A
Other versions
GB0206936D0 (en
Inventor
Bijan Djahansouzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NVF Tech Ltd
Original Assignee
New Transducers Ltd
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 filed Critical New Transducers Ltd
Publication of GB0206936D0 publication Critical patent/GB0206936D0/en
Publication of GB2370446A publication Critical patent/GB2370446A/en
Withdrawn legal-status Critical Current

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).
GB0206936A 1999-12-16 2000-12-11 Acoustic devices Withdrawn GB2370446A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9929731.9A GB9929731D0 (en) 1999-12-16 1999-12-16 Acoustic device
PCT/GB2000/004718 WO2001045458A2 (en) 1999-12-16 2000-12-11 Acoustic devices

Publications (2)

Publication Number Publication Date
GB0206936D0 GB0206936D0 (en) 2002-05-08
GB2370446A true GB2370446A (en) 2002-06-26

Family

ID=10866430

Family Applications (2)

Application Number Title Priority Date Filing Date
GBGB9929731.9A Ceased GB9929731D0 (en) 1999-12-16 1999-12-16 Acoustic device
GB0206936A Withdrawn GB2370446A (en) 1999-12-16 2000-12-11 Acoustic devices

Family Applications Before (1)

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

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

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4969197A (en) * 1988-06-10 1990-11-06 Murata Manufacturing Piezoelectric speaker
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
GB9705979D0 (en) * 1997-03-22 1997-05-07 New Transducers Ltd Passenger vehicles
BR9812167A (en) * 1997-09-03 2000-07-18 New Transducers Ltd Compensating panel comprising a solid acoustic system
KR20010023648A (en) * 1997-09-04 2001-03-26 에이지마, 헨리 Loudspeakers

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
Nopt yet advised *

Also Published As

Publication number Publication date
AU2193101A (en) 2001-06-25
GB9929731D0 (en) 2000-02-09
WO2001045458A2 (en) 2001-06-21
GB0206936D0 (en) 2002-05-08
WO2001045458A3 (en) 2004-02-19

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Legal Events

Date Code Title Description
WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)