HK1007655A1 - Intra-concha type electroacoustic transducer - Google Patents

Intra-concha type electroacoustic transducer Download PDF

Info

Publication number
HK1007655A1
HK1007655A1 HK98106641A HK98106641A HK1007655A1 HK 1007655 A1 HK1007655 A1 HK 1007655A1 HK 98106641 A HK98106641 A HK 98106641A HK 98106641 A HK98106641 A HK 98106641A HK 1007655 A1 HK1007655 A1 HK 1007655A1
Authority
HK
Hong Kong
Prior art keywords
intra
user
type electroacoustic
electroacoustic transducer
transducer
Prior art date
Application number
HK98106641A
Other languages
English (en)
Chinese (zh)
Other versions
HK1007655B (en
Inventor
小林幸雄
Original Assignee
Foster Electric 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 Foster Electric Co., Ltd. filed Critical Foster Electric Co., Ltd.
Publication of HK1007655A1 publication Critical patent/HK1007655A1/xx
Publication of HK1007655B publication Critical patent/HK1007655B/xx

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
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1016—Earpieces of the intra-aural type

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)
HK98106641.3A 1989-06-16 1998-06-25 Intra-concha type electroacoustic transducer HK1007655B (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP1153710A JP2571128B2 (ja) 1989-06-16 1989-06-16 ヘッドホン
JP01153710 1989-06-16

Publications (2)

Publication Number Publication Date
HK1007655A1 true HK1007655A1 (en) 1999-04-16
HK1007655B HK1007655B (en) 1999-04-16

Family

ID=

Also Published As

Publication number Publication date
DE4019250A1 (de) 1990-12-20
JPH0319599A (ja) 1991-01-28
US5142587A (en) 1992-08-25
DE4019250C2 (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 1992-01-16
GB2232849A (en) 1990-12-19
GB9012392D0 (en) 1990-07-25
JP2571128B2 (ja) 1997-01-16
GB2232849B (en) 1994-01-12

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PF Patent in force
PE Patent expired

Effective date: 20100603