EP1221824A4 - Loudspeaker device - Google Patents

Loudspeaker device

Info

Publication number
EP1221824A4
EP1221824A4 EP00950015A EP00950015A EP1221824A4 EP 1221824 A4 EP1221824 A4 EP 1221824A4 EP 00950015 A EP00950015 A EP 00950015A EP 00950015 A EP00950015 A EP 00950015A EP 1221824 A4 EP1221824 A4 EP 1221824A4
Authority
EP
European Patent Office
Prior art keywords
loudspeaker device
loudspeaker
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.)
Granted
Application number
EP00950015A
Other languages
German (de)
French (fr)
Other versions
EP1221824A1 (en
EP1221824B1 (en
Inventor
Hidekazu Tanaka
Fumiyasu Konno
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.)
Panasonic Holdings Corp
Original Assignee
Matsushita Electric Industrial 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 Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP1221824A1 publication Critical patent/EP1221824A1/en
Publication of EP1221824A4 publication Critical patent/EP1221824A4/en
Application granted granted Critical
Publication of EP1221824B1 publication Critical patent/EP1221824B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
EP00950015A 2000-08-07 2000-08-07 Loudspeaker device Expired - Lifetime EP1221824B1 (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 (3)

Publication Number Publication Date
EP1221824A1 EP1221824A1 (en) 2002-07-10
EP1221824A4 true EP1221824A4 (en) 2005-12-07
EP1221824B1 EP1221824B1 (en) 2006-10-25

Family

ID=11736331

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00950015A Expired - Lifetime EP1221824B1 (en) 2000-08-07 2000-08-07 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

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990491A (en) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd Audio device
JPH07162990A (en) * 1993-12-09 1995-06-23 Matsushita Electric Ind Co Ltd Acoustic reproducing deice
EP0951201A2 (en) * 1998-04-15 1999-10-20 Matsushita Electric Industrial Co., Ltd. Audio reproducing apparatus

Family Cites Families (4)

* 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
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
JP3521626B2 (en) * 1996-07-16 2004-04-19 松下電器産業株式会社 Sound reproduction device
US7065221B1 (en) * 1998-12-01 2006-06-20 Matsushita Electric Industrial Co., Ltd. Speaker apparatus

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5990491A (en) * 1982-11-15 1984-05-24 Matsushita Electric Ind Co Ltd Audio device
JPH07162990A (en) * 1993-12-09 1995-06-23 Matsushita Electric Ind Co Ltd Acoustic reproducing deice
EP0951201A2 (en) * 1998-04-15 1999-10-20 Matsushita Electric Industrial Co., Ltd. Audio reproducing apparatus

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 008, no. 206 (E - 267) 20 September 1984 (1984-09-20) *
PATENT ABSTRACTS OF JAPAN vol. 1995, no. 09 31 October 1995 (1995-10-31) *
See also references of WO0213573A1 *

Also Published As

Publication number Publication date
DE60031558D1 (en) 2006-12-07
HK1049940A1 (en) 2003-05-30
CZ299745B6 (en) 2008-11-12
CN1186965C (en) 2005-01-26
HK1049940B (en) 2005-06-10
DE60031558T2 (en) 2007-06-06
WO2002013573A1 (en) 2002-02-14
CZ20021168A3 (en) 2003-02-12
CN1377566A (en) 2002-10-30
EP1221824A1 (en) 2002-07-10
EP1221824B1 (en) 2006-10-25

Similar Documents

Publication Publication Date Title
GB0005222D0 (en) Device
HK1046806A1 (en) Headphone device
GB0000124D0 (en) Device
GB0014634D0 (en) Loudspeaker
HK1054483A1 (en) Loudspeakers
EP1265204A4 (en) Cap-signaling device
GB0018831D0 (en) Loudspeaker
EP1221824A4 (en) Loudspeaker device
GB0007025D0 (en) Loudspeakers
GB0007024D0 (en) Device
GB0016769D0 (en) Device
GB0130875D0 (en) Loudspeaker
GB0013137D0 (en) Loudspeaker
GB0130326D0 (en) Loudspeakers
GB0012323D0 (en) Magnotherapy device
GB2368486B (en) Loudspeaker
GB0101639D0 (en) Loudspeaker device
GB0113481D0 (en) Loudspeakers
TW467459U (en) Speaker device
GB0121767D0 (en) Loudspeaker
GB0023274D0 (en) Loudspeaker
HK1039242A1 (en) Loudspeaker
GB0027450D0 (en) Loudspeakers
GB0003883D0 (en) Loudspeakers
GB0017661D0 (en) Loudspeakers

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20020419

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LI LU MC NL PT SE

RIN1 Information on inventor provided before grant (corrected)

Inventor name: TANAKA, HIDEKAZU

Inventor name: KONNO, FUMIYASU

RBV Designated contracting states (corrected)

Designated state(s): AT BE CH DE FR GB LI

A4 Supplementary search report drawn up and despatched

Effective date: 20051025

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

RBV Designated contracting states (corrected)

Designated state(s): DE FR GB

GRAS Grant fee paid

Free format text: ORIGINAL CODE: EPIDOSNIGR3

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): DE FR GB

REG Reference to a national code

Ref country code: GB

Ref legal event code: FG4D

REF Corresponds to:

Ref document number: 60031558

Country of ref document: DE

Date of ref document: 20061207

Kind code of ref document: P

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed

Effective date: 20070726

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 20070801

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20070808

Year of fee payment: 8

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20080821

Year of fee payment: 9

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 20080807

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20090430

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20080807

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100302