WO2001010168A3 - Loudspeaker - Google Patents

Loudspeaker Download PDF

Info

Publication number
WO2001010168A3
WO2001010168A3 PCT/GB2000/002784 GB0002784W WO0110168A3 WO 2001010168 A3 WO2001010168 A3 WO 2001010168A3 GB 0002784 W GB0002784 W GB 0002784W WO 0110168 A3 WO0110168 A3 WO 0110168A3
Authority
WO
WIPO (PCT)
Prior art keywords
panel
cavity
duct
loudspeaker
resonance frequency
Prior art date
Application number
PCT/GB2000/002784
Other languages
French (fr)
Other versions
WO2001010168A2 (en
Inventor
Neil Harris
Graham Bank
Original Assignee
New Transducers Ltd
Neil Harris
Graham Bank
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, Neil Harris, Graham Bank filed Critical New Transducers Ltd
Priority to DE60003692T priority Critical patent/DE60003692D1/en
Priority to NZ516351A priority patent/NZ516351A/en
Priority to AU60037/00A priority patent/AU6003700A/en
Priority to EP00946162A priority patent/EP1201102B1/en
Priority to AT00946162T priority patent/ATE244494T1/en
Priority to JP2001513935A priority patent/JP2003526968A/en
Publication of WO2001010168A2 publication Critical patent/WO2001010168A2/en
Publication of WO2001010168A3 publication Critical patent/WO2001010168A3/en
Priority to HK02103615.7A priority patent/HK1042012B/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
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/2853—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line
    • H04R1/2857—Enclosures comprising vibrating or resonating arrangements using an acoustic labyrinth or a transmission line for loudspeaker transducers
    • 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 
    • H04R1/28—Transducer mountings or enclosures modified by provision of mechanical or acoustic impedances, e.g. resonator, damping means
    • H04R1/2807—Enclosures comprising vibrating or resonating arrangements
    • H04R1/283—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm
    • H04R1/2834—Enclosures comprising vibrating or resonating arrangements using a passive diaphragm for loudspeaker transducers
    • 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Landscapes

  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Health & Medical Sciences (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Liquid Crystal (AREA)
  • Surgical Instruments (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)

Abstract

A loudspeaker has a bending wave panel (11) and an exciter (13) mounted on the panel to excite bendingg wave modes in the panel. A rear box (15) defines a cavity (17) in cooperation with the panel (11). A resonance of cavity and panel at a coupled mode resonance frequency may be controlled by providing a duct (19) coupled to the cavity to selectively reduce sound pressure at the coupled mode resonance frequency. Damping (21) may be provided in the duct (19).
PCT/GB2000/002784 1999-07-30 2000-07-24 Loudspeaker WO2001010168A2 (en)

Priority Applications (7)

Application Number Priority Date Filing Date Title
DE60003692T DE60003692D1 (en) 1999-07-30 2000-07-24 SPEAKER
NZ516351A NZ516351A (en) 1999-07-30 2000-07-24 Loudspeaker
AU60037/00A AU6003700A (en) 1999-07-30 2000-07-24 Loudspeaker
EP00946162A EP1201102B1 (en) 1999-07-30 2000-07-24 Loudspeaker
AT00946162T ATE244494T1 (en) 1999-07-30 2000-07-24 SPEAKER
JP2001513935A JP2003526968A (en) 1999-07-30 2000-07-24 Loudspeaker
HK02103615.7A HK1042012B (en) 1999-07-30 2002-05-13 Loudspeaker

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9917908.7 1999-07-30
GBGB9917908.7A GB9917908D0 (en) 1999-07-30 1999-07-30 Loudspeakers

Publications (2)

Publication Number Publication Date
WO2001010168A2 WO2001010168A2 (en) 2001-02-08
WO2001010168A3 true WO2001010168A3 (en) 2001-08-16

Family

ID=10858223

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2000/002784 WO2001010168A2 (en) 1999-07-30 2000-07-24 Loudspeaker

Country Status (11)

Country Link
EP (1) EP1201102B1 (en)
JP (1) JP2003526968A (en)
CN (1) CN1250042C (en)
AT (1) ATE244494T1 (en)
AU (1) AU6003700A (en)
DE (1) DE60003692D1 (en)
GB (1) GB9917908D0 (en)
HK (1) HK1042012B (en)
NZ (1) NZ516351A (en)
TW (1) TW490988B (en)
WO (1) WO2001010168A2 (en)

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7426804B2 (en) 2002-02-06 2008-09-23 Andersen Corporation Specialty display window
US6988339B2 (en) 2002-02-06 2006-01-24 Andersen Corporation Specialty media window
US7207413B2 (en) * 2003-06-02 2007-04-24 Tbi Audio Systems Llc Closed loop embedded audio transmission line technology for loudspeaker enclosures and systems
GB0400323D0 (en) * 2004-01-08 2004-02-11 New Transducers Ltd Loudspeakers
GB0410962D0 (en) 2004-05-17 2004-06-16 Mordaunt Short Ltd Loudspeaker
US20060061504A1 (en) * 2004-09-23 2006-03-23 The Regents Of The University Of California Through wall detection and tracking system
WO2007109828A1 (en) * 2006-03-28 2007-10-04 Immersion Technology Property Limited Loudspeaker system with acoustic equalisation
CN104038855A (en) * 2014-06-04 2014-09-10 瑞声光电科技(常州)有限公司 Electric acoustic device and assembly method for same
WO2018070399A1 (en) 2016-10-13 2018-04-19 パナソニックＩｐマネジメント株式会社 Flat speaker and display device
CN107205194B (en) * 2017-06-07 2020-03-06 鞠波 Sound box and sound box system

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848090A (en) * 1971-11-18 1974-11-12 J Walker Wall hanging speaker system
US3938617A (en) * 1974-01-17 1976-02-17 Fort Enterprises, Limited Speaker enclosure
US4899390A (en) * 1986-09-19 1990-02-06 Matsushita Electric Industrial Co., Ltd. Thin speaker having an enclosure within an open portion and a closed portion
EP0453230A2 (en) * 1990-04-20 1991-10-23 Matsushita Electric Industrial Co., Ltd. Speaker system
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3848090A (en) * 1971-11-18 1974-11-12 J Walker Wall hanging speaker system
US3938617A (en) * 1974-01-17 1976-02-17 Fort Enterprises, Limited Speaker enclosure
US4899390A (en) * 1986-09-19 1990-02-06 Matsushita Electric Industrial Co., Ltd. Thin speaker having an enclosure within an open portion and a closed portion
EP0453230A2 (en) * 1990-04-20 1991-10-23 Matsushita Electric Industrial Co., Ltd. Speaker system
WO1997009842A2 (en) * 1995-09-02 1997-03-13 New Transducers Limited Acoustic device

Also Published As

Publication number Publication date
AU6003700A (en) 2001-02-19
ATE244494T1 (en) 2003-07-15
HK1042012B (en) 2003-10-03
GB9917908D0 (en) 1999-09-29
NZ516351A (en) 2002-09-27
HK1042012A1 (en) 2002-07-26
WO2001010168A2 (en) 2001-02-08
TW490988B (en) 2002-06-11
CN1250042C (en) 2006-04-05
EP1201102B1 (en) 2003-07-02
DE60003692D1 (en) 2003-08-07
JP2003526968A (en) 2003-09-09
CN1360809A (en) 2002-07-24
EP1201102A2 (en) 2002-05-02

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