FR938499A - Microphone téléphonique - Google Patents

Microphone téléphonique

Info

Publication number
FR938499A
FR938499A FR938499DA FR938499A FR 938499 A FR938499 A FR 938499A FR 938499D A FR938499D A FR 938499DA FR 938499 A FR938499 A FR 938499A
Authority
FR
France
Prior art keywords
telephone microphone
microphone
telephone
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
English (en)
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.)
Automatic Electric Laboratories Inc
Original Assignee
Automatic Electric Laboratories Inc
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 Automatic Electric Laboratories Inc filed Critical Automatic Electric Laboratories Inc
Application granted granted Critical
Publication of FR938499A publication Critical patent/FR938499A/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
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H04R3/002—Damping circuit arrangements for transducers, e.g. motional feedback circuits
    • 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
    • H04R21/023—Microphones with more than one granular chamber
FR938499D 1939-11-27 1946-12-10 Microphone téléphonique Expired FR938499A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US938499XA 1939-11-27 1939-11-27

Publications (1)

Publication Number Publication Date
FR938499A true FR938499A (fr) 1948-09-16

Family

ID=22241189

Family Applications (1)

Application Number Title Priority Date Filing Date
FR938499D Expired FR938499A (fr) 1939-11-27 1946-12-10 Microphone téléphonique

Country Status (1)

Country Link
FR (1) FR938499A (fr)

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