FR1132430A - Microphone intended more particularly for duplex telephone installations comprising loudspeakers and microphones - Google Patents

Microphone intended more particularly for duplex telephone installations comprising loudspeakers and microphones

Info

Publication number
FR1132430A
FR1132430A FR1132430DA FR1132430A FR 1132430 A FR1132430 A FR 1132430A FR 1132430D A FR1132430D A FR 1132430DA FR 1132430 A FR1132430 A FR 1132430A
Authority
FR
France
Prior art keywords
loudspeakers
microphones
telephone installations
duplex telephone
microphone intended
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
Other languages
French (fr)
Inventor
Carl Schmidbauer
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 filed Critical
Application granted granted Critical
Publication of FR1132430A publication Critical patent/FR1132430A/en
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 
    • H04R1/222—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only  for microphones

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR1132430D 1955-05-24 1955-05-24 Microphone intended more particularly for duplex telephone installations comprising loudspeakers and microphones Expired FR1132430A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1132430T 1955-05-24

Publications (1)

Publication Number Publication Date
FR1132430A true FR1132430A (en) 1957-03-11

Family

ID=9638374

Family Applications (1)

Application Number Title Priority Date Filing Date
FR1132430D Expired FR1132430A (en) 1955-05-24 1955-05-24 Microphone intended more particularly for duplex telephone installations comprising loudspeakers and microphones

Country Status (1)

Country Link
FR (1) FR1132430A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179749A (en) * 1960-03-03 1965-04-20 Milton L Snow Telephone instrument controlling device
US4038502A (en) * 1975-03-19 1977-07-26 Motorola, Inc. Acoustic coupling structure for microphone

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179749A (en) * 1960-03-03 1965-04-20 Milton L Snow Telephone instrument controlling device
US4038502A (en) * 1975-03-19 1977-07-26 Motorola, Inc. Acoustic coupling structure for microphone

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