NZ514593A - Acoustic device with transducer coupling one of groups of modes of overlapping frequencies - Google Patents

Acoustic device with transducer coupling one of groups of modes of overlapping frequencies

Info

Publication number
NZ514593A
NZ514593A NZ514593A NZ51459300A NZ514593A NZ 514593 A NZ514593 A NZ 514593A NZ 514593 A NZ514593 A NZ 514593A NZ 51459300 A NZ51459300 A NZ 51459300A NZ 514593 A NZ514593 A NZ 514593A
Authority
NZ
New Zealand
Prior art keywords
modes
groups
acoustic device
group
overlapping frequencies
Prior art date
Application number
NZ514593A
Inventor
Henry Azima
Neil Harris
Bijan Djahansouzi
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 NZ514593A publication Critical patent/NZ514593A/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)
  • Surface Acoustic Wave Elements And Circuit Networks Thereof (AREA)

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.
NZ514593A 1999-05-15 2000-05-12 Acoustic device with transducer coupling one of groups of modes of overlapping frequencies NZ514593A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9911271.6A GB9911271D0 (en) 1999-05-15 1999-05-15 Acoustic device
PCT/GB2000/001751 WO2000070909A2 (en) 1999-05-15 2000-05-12 Bending wave acoustic device

Publications (1)

Publication Number Publication Date
NZ514593A true NZ514593A (en) 2002-09-27

Family

ID=10853496

Family Applications (1)

Application Number Title Priority Date Filing Date
NZ514593A NZ514593A (en) 1999-05-15 2000-05-12 Acoustic device with transducer coupling one of groups of modes of overlapping frequencies

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
WO2002060218A1 (en) * 2001-01-26 2002-08-01 Harman Audio Electronic Systems Gmbh Flat-panel loudspeaker
GB2386790B (en) * 2001-03-23 2004-08-18 New Transducers Ltd Bending wave acoustic radiator
US7120263B2 (en) 2001-03-23 2006-10-10 New Transducers Limited 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
JP6047575B2 (en) * 2012-08-10 2016-12-21 京セラ株式会社 SOUND GENERATOR, SOUND GENERATOR, AND ELECTRONIC DEVICE

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE69106712T2 (en) * 1990-08-04 1995-06-08 Secr Defence Brit PANEL-SHAPED SPEAKER.
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device
GB9701983D0 (en) * 1997-01-31 1997-03-19 New Transducers Ltd Electro-dynamic exciter
GB9714050D0 (en) * 1997-07-03 1997-09-10 New Transducers Ltd Panel-form loudspeakers

Also Published As

Publication number Publication date
GB9911271D0 (en) 1999-07-14
IL145985A0 (en) 2002-07-25
TW479438B (en) 2002-03-11
JP2003500915A (en) 2003-01-07
CN1350765A (en) 2002-05-22
AU4593300A (en) 2000-12-05
WO2000070909A3 (en) 2001-02-15
EP1179284A2 (en) 2002-02-13
WO2000070909A2 (en) 2000-11-23

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Legal Events

Date Code Title Description
PSEA Patent sealed