FR2572614B1 - Ecouteur electroacoustique - Google Patents

Ecouteur electroacoustique

Info

Publication number
FR2572614B1
FR2572614B1 FR858516208A FR8516208A FR2572614B1 FR 2572614 B1 FR2572614 B1 FR 2572614B1 FR 858516208 A FR858516208 A FR 858516208A FR 8516208 A FR8516208 A FR 8516208A FR 2572614 B1 FR2572614 B1 FR 2572614B1
Authority
FR
France
Prior art keywords
electroacoustic
earphone
electroacoustic earphone
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.)
Expired
Application number
FR858516208A
Other languages
English (en)
Other versions
FR2572614A1 (fr
Inventor
Yoshiyuki Kamon
Makoto Yamagishi
Shingo Watanabe
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.)
Sony Corp
Original Assignee
Sony Corp
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 Sony Corp filed Critical Sony Corp
Publication of FR2572614A1 publication Critical patent/FR2572614A1/fr
Application granted granted Critical
Publication of FR2572614B1 publication Critical patent/FR2572614B1/fr
Expired 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
    • 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 
    • H04R1/225—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for telephonic receivers

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Headphones And Earphones (AREA)
  • Obtaining Desirable Characteristics In Audible-Bandwidth Transducers (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
FR858516208A 1984-10-31 1985-10-31 Ecouteur electroacoustique Expired FR2572614B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1984164754U JPH0733508Y2 (ja) 1984-10-31 1984-10-31 イヤホン

Publications (2)

Publication Number Publication Date
FR2572614A1 FR2572614A1 (fr) 1986-05-02
FR2572614B1 true FR2572614B1 (fr) 1989-12-22

Family

ID=15799284

Family Applications (1)

Application Number Title Priority Date Filing Date
FR858516208A Expired FR2572614B1 (fr) 1984-10-31 1985-10-31 Ecouteur electroacoustique

Country Status (9)

Country Link
US (1) US4646872A (fr)
JP (1) JPH0733508Y2 (fr)
KR (1) KR910006587Y1 (fr)
CA (1) CA1267217A (fr)
DE (1) DE3538615C2 (fr)
FR (1) FR2572614B1 (fr)
GB (1) GB2168220B (fr)
HK (1) HK105590A (fr)
SG (1) SG93890G (fr)

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Also Published As

Publication number Publication date
GB8526552D0 (en) 1985-12-04
DE3538615C2 (de) 1994-06-01
GB2168220B (en) 1988-11-16
KR910006587Y1 (ko) 1991-08-26
DE3538615A1 (de) 1986-05-22
SG93890G (en) 1991-01-18
FR2572614A1 (fr) 1986-05-02
JPS6181283U (fr) 1986-05-29
US4646872A (en) 1987-03-03
KR860005438U (ko) 1986-06-11
JPH0733508Y2 (ja) 1995-07-31
CA1267217A (fr) 1990-03-27
HK105590A (en) 1990-12-21
GB2168220A (en) 1986-06-11

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Legal Events

Date Code Title Description
ST Notification of lapse