EP0464222A4 - Sound reproducing device - Google Patents

Sound reproducing device

Info

Publication number
EP0464222A4
EP0464222A4 EP19910902758 EP91902758A EP0464222A4 EP 0464222 A4 EP0464222 A4 EP 0464222A4 EP 19910902758 EP19910902758 EP 19910902758 EP 91902758 A EP91902758 A EP 91902758A EP 0464222 A4 EP0464222 A4 EP 0464222A4
Authority
EP
European Patent Office
Prior art keywords
reproducing device
sound reproducing
sound
reproducing
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
EP19910902758
Other versions
EP0464222A1 (en
EP0464222B1 (en
Inventor
Atsushi Nagayoshi
Koichi Higuchi
Kazutoshi Yamaguchi
Eiichi Takakura
Masataka Saito
Fusanori I
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
Priority claimed from JP2011455A external-priority patent/JP2745753B2/en
Priority claimed from JP2100072A external-priority patent/JPH03297209A/en
Application filed by Matsushita Electric Industrial Co Ltd filed Critical Matsushita Electric Industrial Co Ltd
Publication of EP0464222A1 publication Critical patent/EP0464222A1/en
Publication of EP0464222A4 publication Critical patent/EP0464222A4/en
Application granted granted Critical
Publication of EP0464222B1 publication Critical patent/EP0464222B1/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
    • H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Circuit For Audible Band Transducer (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
EP91902758A 1990-01-19 1991-01-16 Sound reproducing device Expired - Lifetime EP0464222B1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2011455A JP2745753B2 (en) 1990-01-19 1990-01-19 Sound reproduction device
JP11455/90 1990-01-19
JP100072/90 1990-04-16
JP2100072A JPH03297209A (en) 1990-04-16 1990-04-16 Acoustic reproducing device
PCT/JP1991/000028 WO1991011077A1 (en) 1990-01-19 1991-01-16 Sound reproducing device

Publications (3)

Publication Number Publication Date
EP0464222A1 EP0464222A1 (en) 1992-01-08
EP0464222A4 true EP0464222A4 (en) 1992-11-04
EP0464222B1 EP0464222B1 (en) 1995-11-22

Family

ID=26346879

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91902758A Expired - Lifetime EP0464222B1 (en) 1990-01-19 1991-01-16 Sound reproducing device

Country Status (3)

Country Link
EP (1) EP0464222B1 (en)
DE (1) DE69114772T2 (en)
WO (1) WO1991011077A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114866639A (en) * 2022-04-29 2022-08-05 维沃移动通信有限公司 Electronic equipment, control method and device

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122663A2 (en) * 1983-04-08 1984-10-24 Tommyca Freadman Method and system for improving speaker performance
EP0130613A2 (en) * 1983-07-04 1985-01-09 Victor Company Of Japan, Limited Noise reduction circuit

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5931051Y2 (en) * 1978-03-17 1984-09-04 三洋電機株式会社 Earphone volume automatic adjustment circuit
JPS583305A (en) * 1981-06-29 1983-01-10 Hitachi Ltd Automatic sound volume adjusting circuit
JPS5991090U (en) * 1982-12-10 1984-06-20 アイワ株式会社 Open air headphone
JPS60145714A (en) * 1984-01-06 1985-08-01 Nissan Motor Co Ltd Acoustic device for vehicle
JPS60223284A (en) * 1984-03-31 1985-11-07 Fujitsu Ltd Preventing circuit for leakage of audible sound

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0122663A2 (en) * 1983-04-08 1984-10-24 Tommyca Freadman Method and system for improving speaker performance
EP0130613A2 (en) * 1983-07-04 1985-01-09 Victor Company Of Japan, Limited Noise reduction circuit

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 75 (E-390)25 March 1986 & JP-A-60 223 284 ( FUJITSU ) 7 November 1985 *
See also references of WO9111077A1 *

Also Published As

Publication number Publication date
DE69114772T2 (en) 1996-04-18
WO1991011077A1 (en) 1991-07-25
EP0464222A1 (en) 1992-01-08
DE69114772D1 (en) 1996-01-04
EP0464222B1 (en) 1995-11-22

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