FR778751A - Microphone - Google Patents

Microphone

Info

Publication number
FR778751A
FR778751A FR778751DA FR778751A FR 778751 A FR778751 A FR 778751A FR 778751D A FR778751D A FR 778751DA FR 778751 A FR778751 A FR 778751A
Authority
FR
France
Prior art keywords
microphone
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.)
ACCUMULATEURS MONOPLAQUE SA
Original Assignee
ACCUMULATEURS MONOPLAQUE SA
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 ACCUMULATEURS MONOPLAQUE SA filed Critical ACCUMULATEURS MONOPLAQUE SA
Application granted granted Critical
Publication of FR778751A publication Critical patent/FR778751A/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)
FR778751D 1933-12-12 1933-12-12 Microphone Expired FR778751A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR778751T 1933-12-12

Publications (1)

Publication Number Publication Date
FR778751A true FR778751A (fr) 1935-03-23

Family

ID=9202347

Family Applications (1)

Application Number Title Priority Date Filing Date
FR778751D Expired FR778751A (fr) 1933-12-12 1933-12-12 Microphone

Country Status (1)

Country Link
FR (1) FR778751A (fr)

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