+

WO2002013574A3 - Bending wave loudspeaker - Google Patents

Bending wave loudspeaker Download PDF

Info

Publication number
WO2002013574A3
WO2002013574A3 PCT/GB2001/003310 GB0103310W WO0213574A3 WO 2002013574 A3 WO2002013574 A3 WO 2002013574A3 GB 0103310 W GB0103310 W GB 0103310W WO 0213574 A3 WO0213574 A3 WO 0213574A3
Authority
WO
WIPO (PCT)
Prior art keywords
frequency
panel
predetermined frequency
bending wave
bending waves
Prior art date
Application number
PCT/GB2001/003310
Other languages
French (fr)
Other versions
WO2002013574A2 (en
Inventor
Paul Burton
Original Assignee
New Transducers Ltd
Paul Burton
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, Paul Burton filed Critical New Transducers Ltd
Priority to AU2001275698A priority Critical patent/AU2001275698A1/en
Publication of WO2002013574A2 publication Critical patent/WO2002013574A2/en
Publication of WO2002013574A3 publication Critical patent/WO2002013574A3/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/12—Circuits for transducers, loudspeakers or microphones for distributing signals to two or more loudspeakers
    • H04R3/14—Cross-over networks

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

A loudspeaker comprising a panel capable of supporting bending waves, a low frequency transducer mounted to the panel for exciting bending waves in the panel at frequencies below a predetermined frequency, a high-frequency transducer mounted to the panel for exciting bending waves in the panel at frequencies above the predetermined frequency, and crossover circuitry for supplying a signal to the low-frequency transducer at frequencies below the predetermined frequency and to the high-frequency transducer for frequencies above the predetermined frequency, wherein the predetermined frequency is substantially equal to the coincidence frequency.
PCT/GB2001/003310 2000-08-03 2001-07-24 Bending wave loudspeaker WO2002013574A2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2001275698A AU2001275698A1 (en) 2000-08-03 2001-07-24 Bending wave loudspeaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB0018997.7 2000-08-03
GB0018997A GB0018997D0 (en) 2000-08-03 2000-08-03 Bending wave loudspeaker

Publications (2)

Publication Number Publication Date
WO2002013574A2 WO2002013574A2 (en) 2002-02-14
WO2002013574A3 true WO2002013574A3 (en) 2002-11-14

Family

ID=9896857

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2001/003310 WO2002013574A2 (en) 2000-08-03 2001-07-24 Bending wave loudspeaker

Country Status (3)

Country Link
AU (1) AU2001275698A1 (en)
GB (1) GB0018997D0 (en)
WO (1) WO2002013574A2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2517721A (en) * 2013-08-29 2015-03-04 Nokia Corp Speaker apparatus
CA2995833C (en) * 2015-08-20 2024-01-23 University Of Rochester Systems and methods for controlling plate loudspeakers using modal crossover networks
JP6907204B2 (en) 2015-11-25 2021-07-21 ユニバーシティ オブ ロチェスター Systems and methods for generating audio scenes by controlling panel vibration spatially and temporally
US10966042B2 (en) 2015-11-25 2021-03-30 The University Of Rochester Method for rendering localized vibrations on panels

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
WO1998028942A1 (en) * 1996-12-20 1998-07-02 Nct Group, Inc. Electroacoustic transducers comprising vibrating panels
EP0936842A1 (en) * 1995-09-25 1999-08-18 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
WO2000033612A2 (en) * 1998-11-30 2000-06-08 New Transducers Limited Bending wave acoustic devices

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
EP0936842A1 (en) * 1995-09-25 1999-08-18 Noise Cancellation Technologies, Inc. Piezo speaker for improved passenger cabin audio systems
WO1998028942A1 (en) * 1996-12-20 1998-07-02 Nct Group, Inc. Electroacoustic transducers comprising vibrating panels
WO2000033612A2 (en) * 1998-11-30 2000-06-08 New Transducers Limited Bending wave acoustic devices

Also Published As

Publication number Publication date
WO2002013574A2 (en) 2002-02-14
GB0018997D0 (en) 2000-09-20
AU2001275698A1 (en) 2002-02-18

Similar Documents

Publication Publication Date Title
WO2000033612A3 (en) Bending wave acoustic devices
YU17201A (en) Panel form acoustic apparatus using bending waves modes
TW428415B (en) Panel-form loudspeakers
WO2003022000A3 (en) Interchangeable pivoting loudspeaker assembly with spring retained high frequency transducer
WO2001054450A3 (en) Transducer in particularly for use in acoustic devices
MXPA02003983A (en) Ultra low frequency transducer and loud speaker comprising same.
EP1087463A3 (en) A multi-pattern antenna having independent controllable antenna pattern characteristics
IL123489A0 (en) Acoustic device
EP1056202B8 (en) Method of producing a surface acoustic wave device
TW200601868A (en) Loudspeakers
AU2001252961A1 (en) Physiological condition monitors utilizing very low frequency acoustic signals
AU2001255189A1 (en) Apparatus and method for detecting very low frequency acoustic signals
AU3480800A (en) Adjustable radio frequency power amplifier and transmitter
IL140655A0 (en) Acoustic device using bending wave modes
WO2004100600A3 (en) Transmission of acoustic vibrations to a surface over the display of a mobile device
EP1045613A3 (en) Driving circuit, electro-mechanical-acoustic transducer, and portable terminal apparatus
GB8909407D0 (en) Processes and electro-acoustic transducers for transmitting low frequency acoustic waves in a liquid
AU2002366821A1 (en) The use of arc straightening in hid lamps operated at vhf frequencies
WO2002013574A3 (en) Bending wave loudspeaker
MXPA03004732A (en) Loudspeakers.
DE69617350D1 (en) Radio frequency waves etching
AU2001293686A1 (en) Hearing aid with a radio frequency receiver
WO2001005189A3 (en) Bending wave panel speaker and method of driving such a speaker
ATE244494T1 (en) SPEAKER
WO2002013575A8 (en) Bending wave loudspeaker

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A2

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A2

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

121 Ep: the epo has been informed by wipo that ep was designated in this application
AK Designated states

Kind code of ref document: A3

Designated state(s): AE AG AL AM AT AU AZ BA BB BG BR BY BZ CA CH CN CO CR CU CZ DE DK DM DZ EC EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MA MD MG MK MN MW MX MZ NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT TZ UA UG US UZ VN YU ZA ZW

AL Designated countries for regional patents

Kind code of ref document: A3

Designated state(s): GH GM KE LS MW MZ SD SL SZ TZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE TR BF BJ CF CG CI CM GA GN GQ GW ML MR NE SN TD TG

REG Reference to national code

Ref country code: DE

Ref legal event code: 8642

122 Ep: pct application non-entry in european phase
NENP Non-entry into the national phase

Ref country code: JP

点击 这是indexloc提供的php浏览器服务，不要输入任何密码和下载