FR339065A - Perfectionnements aux microphones - Google Patents

Perfectionnements aux microphones

Info

Publication number
FR339065A
FR339065A FR339065DA FR339065A FR 339065 A FR339065 A FR 339065A FR 339065D A FR339065D A FR 339065DA FR 339065 A FR339065 A FR 339065A
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)
Inventor
Jules Cerpaux
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.)
LAMBERT FRERES SOC
Original Assignee
LAMBERT FRERES SOC
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 LAMBERT FRERES SOC filed Critical LAMBERT FRERES SOC
Application granted granted Critical
Publication of FR339065A publication Critical patent/FR339065A/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)
FR339065D 1903-09-26 1903-09-26 Perfectionnements aux microphones Expired FR339065A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR339065T 1903-09-26

Publications (1)

Publication Number Publication Date
FR339065A true FR339065A (fr) 1904-10-22

Family

ID=1388314

Family Applications (1)

Application Number Title Priority Date Filing Date
FR339065D Expired FR339065A (fr) 1903-09-26 1903-09-26 Perfectionnements aux microphones

Country Status (1)

Country Link
FR (1) FR339065A (fr)

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