FR779977A - Microphone refinements - Google Patents

Microphone refinements

Info

Publication number
FR779977A
FR779977A FR779977DA FR779977A FR 779977 A FR779977 A FR 779977A FR 779977D A FR779977D A FR 779977DA FR 779977 A FR779977 A FR 779977A
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)
Inventor
Rene Louvet
Maurice Leon Labastrou
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 FR779977A publication Critical patent/FR779977A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR779977D 1934-01-08 1934-01-08 Microphone refinements Expired FR779977A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR779977T 1934-01-08

Publications (1)

Publication Number Publication Date
FR779977A true FR779977A (en) 1935-04-17

Family

ID=9203037

Family Applications (1)

Application Number Title Priority Date Filing Date
FR779977D Expired FR779977A (en) 1934-01-08 1934-01-08 Microphone refinements

Country Status (1)

Country Link
FR (1) FR779977A (en)

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