FR633464A - Perfectionnement aux microphones - Google Patents

Perfectionnement aux microphones

Info

Publication number
FR633464A
FR633464A FR633464DA FR633464A FR 633464 A FR633464 A FR 633464A FR 633464D A FR633464D A FR 633464DA FR 633464 A FR633464 A FR 633464A
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
English (en)
Inventor
Emile Chabault
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 FR633464A publication Critical patent/FR633464A/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)
FR633464D 1926-09-02 1926-09-02 Perfectionnement aux microphones Expired FR633464A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR633464T 1926-09-02

Publications (1)

Publication Number Publication Date
FR633464A true FR633464A (fr) 1928-01-30

Family

ID=8992922

Family Applications (1)

Application Number Title Priority Date Filing Date
FR633464D Expired FR633464A (fr) 1926-09-02 1926-09-02 Perfectionnement aux microphones

Country Status (1)

Country Link
FR (1) FR633464A (fr)

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