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FR977486A - Microphone refinements - Google Patents

Microphone refinements

Info

Publication number
FR977486A
FR977486A FR977486DA FR977486A FR 977486 A FR977486 A FR 977486A FR 977486D A FR977486D A FR 977486DA FR 977486 A FR977486 A FR 977486A
Authority
FR
France
Prior art keywords
refinements
microphone
microphone refinements
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)
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.)
Mersen SA
Original Assignee
Carbone Lorraine SA
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 Carbone Lorraine SA filed Critical Carbone Lorraine SA
Application granted granted Critical
Publication of FR977486A publication Critical patent/FR977486A/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
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/028—Microphones with a fluid as resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR977486D 1942-07-20 1942-07-20 Microphone refinements Expired FR977486A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR977486T 1942-07-20

Publications (1)

Publication Number Publication Date
FR977486A true FR977486A (en) 1951-04-02

Family

ID=9519743

Family Applications (1)

Application Number Title Priority Date Filing Date
FR977486D Expired FR977486A (en) 1942-07-20 1942-07-20 Microphone refinements

Country Status (2)

Country Link
BE (1) BE447229A (en)
FR (1) FR977486A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000027166A2 (en) * 1998-11-02 2000-05-11 Sarnoff Corporation Transducer concepts for hearing aids and other devices

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2000027166A2 (en) * 1998-11-02 2000-05-11 Sarnoff Corporation Transducer concepts for hearing aids and other devices
WO2000027166A3 (en) * 1998-11-02 2000-10-26 Sarnoff Corp Transducer concepts for hearing aids and other devices

Also Published As

Publication number Publication date
BE447229A (en)

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