HK1042012A1 - Loudspeaker - Google Patents

Loudspeaker

Info

Publication number
HK1042012A1
HK1042012A1 HK02103615A HK02103615A HK1042012A1 HK 1042012 A1 HK1042012 A1 HK 1042012A1 HK 02103615 A HK02103615 A HK 02103615A HK 02103615 A HK02103615 A HK 02103615A HK 1042012 A1 HK1042012 A1 HK 1042012A1
Authority
HK
Hong Kong
Prior art keywords
panel
cavity
duct
loudspeaker
resonance frequency
Prior art date
Application number
HK02103615A
Other versions
HK1042012B (en
Inventor
Neil Harris
Graham Bank
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 HK1042012A1 publication Critical patent/HK1042012A1/en
Publication of HK1042012B publication Critical 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

  • 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)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Liquid Crystal (AREA)
  • Surgical Instruments (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
  • Media Introduction/Drainage Providing Device (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).
HK02103615.7A 1999-07-30 2002-05-13 Loudspeaker HK1042012B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9917908.7A GB9917908D0 (en) 1999-07-30 1999-07-30 Loudspeakers
PCT/GB2000/002784 WO2001010168A2 (en) 1999-07-30 2000-07-24 Loudspeaker

Publications (2)

Publication Number Publication Date
HK1042012A1 true HK1042012A1 (en) 2002-07-26
HK1042012B HK1042012B (en) 2003-10-03

Family

ID=10858223

Family Applications (1)

Application Number Title Priority Date Filing Date
HK02103615.7A HK1042012B (en) 1999-07-30 2002-05-13 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
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
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
US10674271B2 (en) 2016-10-13 2020-06-02 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
CN1250042C (en) 2006-04-05
EP1201102B1 (en) 2003-07-02
AU6003700A (en) 2001-02-19
CN1360809A (en) 2002-07-24
EP1201102A2 (en) 2002-05-02
TW490988B (en) 2002-06-11
JP2003526968A (en) 2003-09-09
DE60003692D1 (en) 2003-08-07
GB9917908D0 (en) 1999-09-29
NZ516351A (en) 2002-09-27
WO2001010168A2 (en) 2001-02-08
WO2001010168A3 (en) 2001-08-16
ATE244494T1 (en) 2003-07-15
HK1042012B (en) 2003-10-03

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Legal Events

Date Code Title Description
PF Patent in force
PC Patent ceased (i.e. patent has lapsed due to the failure to pay the renewal fee)

Effective date: 20180724