HK1049940A1 - Loudspeaker device. - Google Patents

Loudspeaker device.

Info

Publication number
HK1049940A1
HK1049940A1 HK03101884A HK03101884A HK1049940A1 HK 1049940 A1 HK1049940 A1 HK 1049940A1 HK 03101884 A HK03101884 A HK 03101884A HK 03101884 A HK03101884 A HK 03101884A HK 1049940 A1 HK1049940 A1 HK 1049940A1
Authority
HK
Hong Kong
Prior art keywords
loudspeaker device
loudspeaker
Prior art date
Application number
HK03101884A
Other versions
HK1049940B (en
Inventor
Hidekazu Tanaka
Fumiyasu Konno
Original Assignee
Matsushita Electric Ind Co 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 Matsushita Electric Ind Co Ltd filed Critical Matsushita Electric Ind Co Ltd
Publication of HK1049940A1 publication Critical patent/HK1049940A1/en
Publication of HK1049940B publication Critical patent/HK1049940B/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
HK03101884.4A 2000-08-07 2003-03-14 Loudspeaker device HK1049940B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2000/005271 WO2002013573A1 (en) 1999-05-19 2000-08-07 Loudspeaker device

Publications (2)

Publication Number Publication Date
HK1049940A1 true HK1049940A1 (en) 2003-05-30
HK1049940B HK1049940B (en) 2005-06-10

Family

ID=11736331

Family Applications (1)

Application Number Title Priority Date Filing Date
HK03101884.4A HK1049940B (en) 2000-08-07 2003-03-14 Loudspeaker device

Country Status (6)

Country Link
EP (1) EP1221824B1 (en)
CN (1) CN1186965C (en)
CZ (1) CZ299745B6 (en)
DE (1) DE60031558T2 (en)
HK (1) HK1049940B (en)
WO (1) WO2002013573A1 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003264888A (en) * 2002-03-07 2003-09-19 Pioneer Electronic Corp Speaker controller and speaker system
CN100566140C (en) * 2003-10-14 2009-12-02 音频专用集成电路公司 Microphone preamplifier
US8243939B2 (en) * 2008-12-30 2012-08-14 Gn Resound A/S Hearing instrument with improved initialisation of parameters of digital feedback suppression circuitry
CN102384821B (en) * 2011-08-10 2015-07-29 歌尔声学股份有限公司 Loudspeaker module air tightness testing method, test fixture and test macro

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3798374A (en) * 1972-04-03 1974-03-19 Rene Oliveras Sound reproducing system utilizing motional feedback
JPS5990491A (en) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd Audio device
DE4021787A1 (en) * 1990-07-09 1992-01-16 Telefunken Electronic Gmbh Electro-acoustic system e.g. for telephone appts. - controls coupling between loudspeaker and microphone via space to suppress acoustic feedback using filter and/or modulator
JP3132270B2 (en) * 1993-12-09 2001-02-05 松下電器産業株式会社 Sound reproduction device
JP3521626B2 (en) * 1996-07-16 2004-04-19 松下電器産業株式会社 Sound reproduction device
JP3893730B2 (en) * 1998-04-15 2007-03-14 松下電器産業株式会社 Sound playback device
US7065221B1 (en) * 1998-12-01 2006-06-20 Matsushita Electric Industrial Co., Ltd. Speaker apparatus

Also Published As

Publication number Publication date
EP1221824B1 (en) 2006-10-25
EP1221824A4 (en) 2005-12-07
CN1377566A (en) 2002-10-30
CZ299745B6 (en) 2008-11-12
DE60031558T2 (en) 2007-06-06
HK1049940B (en) 2005-06-10
CZ20021168A3 (en) 2003-02-12
EP1221824A1 (en) 2002-07-10
CN1186965C (en) 2005-01-26
DE60031558D1 (en) 2006-12-07
WO2002013573A1 (en) 2002-02-14

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Legal Events

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

Effective date: 20080807