FR534835A - - Google Patents

Info

Publication number
FR534835A
FR534835A FR534835DA FR534835A FR 534835 A FR534835 A FR 534835A FR 534835D A FR534835D A FR 534835DA FR 534835 A FR534835 A FR 534835A
Authority
FR
France
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)
Publication date
Application granted granted Critical
Publication of FR534835A publication Critical patent/FR534835A/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; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R21/00—Variable-resistance transducers
    • H04R21/02—Microphones
    • H04R21/021—Microphones with granular resistance material

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR534835D Expired FR534835A (cg-RX-API-DMAC10.html)

Publications (1)

Publication Number Publication Date
FR534835A true FR534835A (cg-RX-API-DMAC10.html) 1922-04-03

Family

ID=1537190

Family Applications (1)

Application Number Title Priority Date Filing Date
FR534835D Expired FR534835A (cg-RX-API-DMAC10.html)

Country Status (1)

Country Link
FR (1) FR534835A (cg-RX-API-DMAC10.html)

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