FR832461A - Microphone development - Google Patents

Microphone development

Info

Publication number
FR832461A
FR832461A FR832461DA FR832461A FR 832461 A FR832461 A FR 832461A FR 832461D A FR832461D A FR 832461DA FR 832461 A FR832461 A FR 832461A
Authority
FR
France
Prior art keywords
microphone
development
microphone development
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.)
LE TELEPHONE PRIVE NAT
Original Assignee
LE TELEPHONE PRIVE NAT
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 LE TELEPHONE PRIVE NAT filed Critical LE TELEPHONE PRIVE NAT
Application granted granted Critical
Publication of FR832461A publication Critical patent/FR832461A/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
    • H04R21/021—Microphones with granular resistance material
FR832461D 1937-05-07 1937-05-07 Microphone development Expired FR832461A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR832461T 1937-05-07

Publications (1)

Publication Number Publication Date
FR832461A true FR832461A (en) 1938-09-28

Family

ID=9296005

Family Applications (1)

Application Number Title Priority Date Filing Date
FR832461D Expired FR832461A (en) 1937-05-07 1937-05-07 Microphone development

Country Status (1)

Country Link
FR (1) FR832461A (en)

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