WO2001041498A3 - Bending wave loudspeakers - Google Patents

Bending wave loudspeakers Download PDF

Info

Publication number
WO2001041498A3
WO2001041498A3 PCT/GB2000/004510 GB0004510W WO0141498A3 WO 2001041498 A3 WO2001041498 A3 WO 2001041498A3 GB 0004510 W GB0004510 W GB 0004510W WO 0141498 A3 WO0141498 A3 WO 0141498A3
Authority
WO
WIPO (PCT)
Prior art keywords
panels
cavity
fluid
pair
bending wave
Prior art date
Application number
PCT/GB2000/004510
Other languages
French (fr)
Other versions
WO2001041498A2 (en
Inventor
Andreas Buos
Original Assignee
New Transducers Ltd
Andreas Buos
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, Andreas Buos filed Critical New Transducers Ltd
Priority to EP00985445A priority Critical patent/EP1234478A2/en
Priority to AU21864/01A priority patent/AU2186401A/en
Publication of WO2001041498A2 publication Critical patent/WO2001041498A2/en
Publication of WO2001041498A3 publication Critical patent/WO2001041498A3/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
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/227—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  using transducers reproducing the same frequency band

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Piezo-Electric Transducers For Audible Bands (AREA)

Abstract

A bending wave panel-form loudspeaker comprises a spaced pair of panels defining between them a shallow fluid cavity, a body member surrounding the pair of panels and suspending the panels by their edges, means sealing the cavity and vibration transducers in the fluid cavity and arranged to drive the respective panels, the electrical connections to the transducers being at least partially in antiphase such that the predominant motion of the panels is in phase to provide a degree of dipole radiation property for the loudspeaker, and the cavity being such that the gap between the panels is in the range 2 to 25 mm such that the shallow cavity provides conditions in which fluid coupling dynamics and behaviour is asserted between the pair of panels due to the fluid layer between them.
PCT/GB2000/004510 1999-12-02 2000-11-28 Bending wave loudspeakers WO2001041498A2 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP00985445A EP1234478A2 (en) 1999-12-02 2000-11-28 Bending wave loudspeakers
AU21864/01A AU2186401A (en) 1999-12-02 2000-11-28 Loudspeakers

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9928456.4A GB9928456D0 (en) 1999-12-02 1999-12-02 Loudspeakers
GB9928456.4 1999-12-02

Publications (2)

Publication Number Publication Date
WO2001041498A2 WO2001041498A2 (en) 2001-06-07
WO2001041498A3 true WO2001041498A3 (en) 2002-05-10

Family

ID=10865539

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/004510 WO2001041498A2 (en) 1999-12-02 2000-11-28 Bending wave loudspeakers

Country Status (5)

Country Link
EP (1) EP1234478A2 (en)
CN (1) CN1390429A (en)
AU (1) AU2186401A (en)
GB (1) GB9928456D0 (en)
WO (1) WO2001041498A2 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB0221503D0 (en) * 2002-09-17 2002-10-23 1 Ltd Loudspeaker
WO2005009074A1 (en) * 2003-07-16 2005-01-27 Koninklijke Philips Electronics N.V. Panel-shaped acoustic wave generator
KR102608137B1 (en) * 2018-09-20 2023-11-29 엘지디스플레이 주식회사 Display apparatus

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998016409A1 (en) * 1996-10-16 1998-04-23 Nct Group, Inc. Vehicle loudspeakers
NZ330777A (en) * 1998-06-22 1999-08-30 Slab Technology Ltd Loudspeaker with a planar diaphragm having a bending strength along one axis which is greater that along a second axis perpendicular to the first axis
WO1999067974A1 (en) * 1998-06-22 1999-12-29 Slab Technology Limited Loudspeakers

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device
WO1998016409A1 (en) * 1996-10-16 1998-04-23 Nct Group, Inc. Vehicle loudspeakers
NZ330777A (en) * 1998-06-22 1999-08-30 Slab Technology Ltd Loudspeaker with a planar diaphragm having a bending strength along one axis which is greater that along a second axis perpendicular to the first axis
WO1999067974A1 (en) * 1998-06-22 1999-12-29 Slab Technology Limited Loudspeakers

Also Published As

Publication number Publication date
CN1390429A (en) 2003-01-08
GB9928456D0 (en) 2000-01-26
EP1234478A2 (en) 2002-08-28
AU2186401A (en) 2001-06-12
WO2001041498A2 (en) 2001-06-07

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