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GB9917908D0 - Loudspeakers - Google Patents

Loudspeakers

Info

Publication number
GB9917908D0
GB9917908D0 GBGB9917908.7A GB9917908A GB9917908D0 GB 9917908 D0 GB9917908 D0 GB 9917908D0 GB 9917908 A GB9917908 A GB 9917908A GB 9917908 D0 GB9917908 D0 GB 9917908D0
Authority
GB
United Kingdom
Prior art keywords
panel
cavity
duct
resonance frequency
coupled
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.)
Ceased
Application number
GBGB9917908.7A
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
Priority to GBGB9917908.7A priority Critical patent/GB9917908D0/en
Publication of GB9917908D0 publication Critical patent/GB9917908D0/en
Priority to AT00946162T priority patent/ATE244494T1/en
Priority to NZ516351A priority patent/NZ516351A/en
Priority to CNB00810297XA priority patent/CN1250042C/en
Priority to EP00946162A priority patent/EP1201102B1/en
Priority to PCT/GB2000/002784 priority patent/WO2001010168A2/en
Priority to JP2001513935A priority patent/JP2003526968A/en
Priority to AU60037/00A priority patent/AU6003700A/en
Priority to DE60003692T priority patent/DE60003692D1/en
Priority to TW089115038A priority patent/TW490988B/en
Priority to HK02103615.7A priority patent/HK1042012B/en
Ceased 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
    • 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

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Media Introduction/Drainage Providing Device (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Liquid Crystal (AREA)
  • Surgical Instruments (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).
GBGB9917908.7A 1999-07-30 1999-07-30 Loudspeakers Ceased GB9917908D0 (en)

Priority Applications (11)

Application Number Priority Date Filing Date Title
GBGB9917908.7A GB9917908D0 (en) 1999-07-30 1999-07-30 Loudspeakers
DE60003692T DE60003692D1 (en) 1999-07-30 2000-07-24 SPEAKER
EP00946162A EP1201102B1 (en) 1999-07-30 2000-07-24 Loudspeaker
NZ516351A NZ516351A (en) 1999-07-30 2000-07-24 Loudspeaker
CNB00810297XA CN1250042C (en) 1999-07-30 2000-07-24 Loudspeaker
AT00946162T ATE244494T1 (en) 1999-07-30 2000-07-24 SPEAKER
PCT/GB2000/002784 WO2001010168A2 (en) 1999-07-30 2000-07-24 Loudspeaker
JP2001513935A JP2003526968A (en) 1999-07-30 2000-07-24 Loudspeaker
AU60037/00A AU6003700A (en) 1999-07-30 2000-07-24 Loudspeaker
TW089115038A TW490988B (en) 1999-07-30 2000-07-27 Loudspeaker
HK02103615.7A HK1042012B (en) 1999-07-30 2002-05-13 Loudspeaker

Applications Claiming Priority (1)

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

Publications (1)

Publication Number Publication Date
GB9917908D0 true GB9917908D0 (en) 1999-09-29

Family

ID=10858223

Family Applications (1)

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

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
US6988339B2 (en) 2002-02-06 2006-01-24 Andersen Corporation Specialty media window
US7426804B2 (en) 2002-02-06 2008-09-23 Andersen Corporation Specialty display 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
AU2007231525A1 (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
EP3528510B1 (en) * 2016-10-13 2022-02-09 Panasonic Intellectual Property Management Co., Ltd. Flat speaker and display device
CN107205194B (en) * 2017-06-07 2020-03-06 鞠波 Sound box and sound box system

Family Cites Families (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
DE69110530T2 (en) * 1990-04-20 1996-02-29 Matsushita Electric Ind Co Ltd Speaker system.
UA51671C2 (en) * 1995-09-02 2002-12-16 Нью Транзд'Юсез Лімітед Acoustic device

Also Published As

Publication number Publication date
WO2001010168A3 (en) 2001-08-16
DE60003692D1 (en) 2003-08-07
EP1201102B1 (en) 2003-07-02
TW490988B (en) 2002-06-11
AU6003700A (en) 2001-02-19
CN1360809A (en) 2002-07-24
ATE244494T1 (en) 2003-07-15
NZ516351A (en) 2002-09-27
WO2001010168A2 (en) 2001-02-08
EP1201102A2 (en) 2002-05-02
HK1042012B (en) 2003-10-03
CN1250042C (en) 2006-04-05
HK1042012A1 (en) 2002-07-26
JP2003526968A (en) 2003-09-09

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Legal Events

Date Code Title Description
AT Applications terminated before publication under section 16(1)