FR445726A - Perfectionnements aux microphones - Google Patents

Perfectionnements aux microphones

Info

Publication number
FR445726A
FR445726A FR445726DA FR445726A FR 445726 A FR445726 A FR 445726A FR 445726D A FR445726D A FR 445726DA FR 445726 A FR445726 A FR 445726A
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
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.)
Compagnie Francaise Thomson Houston SA
Original Assignee
Compagnie Francaise Thomson Houston 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 Compagnie Francaise Thomson Houston SA filed Critical Compagnie Francaise Thomson Houston SA
Application granted granted Critical
Publication of FR445726A publication Critical patent/FR445726A/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)
FR445726D 1912-07-03 1912-07-03 Perfectionnements aux microphones Expired FR445726A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR445726T 1912-07-03

Publications (1)

Publication Number Publication Date
FR445726A true FR445726A (fr) 1912-11-18

Family

ID=1486585

Family Applications (1)

Application Number Title Priority Date Filing Date
FR445726D Expired FR445726A (fr) 1912-07-03 1912-07-03 Perfectionnements aux microphones

Country Status (1)

Country Link
FR (1) FR445726A (fr)

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