FR416171A - Microphone - Google Patents

Microphone

Info

Publication number
FR416171A
FR416171A FR416171A FR416171DA FR416171A FR 416171 A FR416171 A FR 416171A FR 416171 A FR416171 A FR 416171A FR 416171D A FR416171D A FR 416171DA FR 416171 A FR416171 A FR 416171A
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
FR416171A
Other languages
English (en)
Inventor
Fernand Bourdil
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.)
Individual
Original Assignee
Individual
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of FR416171A publication Critical patent/FR416171A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR416171A 1909-07-31 Microphone Expired FR416171A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR12695T

Publications (1)

Publication Number Publication Date
FR416171A true FR416171A (fr) 1910-10-13

Family

ID=8641221

Family Applications (2)

Application Number Title Priority Date Filing Date
FR12695A Expired FR12695E (fr) Microphone
FR416171A Expired FR416171A (fr) 1909-07-31 Microphone

Family Applications Before (1)

Application Number Title Priority Date Filing Date
FR12695A Expired FR12695E (fr) Microphone

Country Status (1)

Country Link
FR (2) FR416171A (fr)

Also Published As

Publication number Publication date
FR12695E (fr) 1910-10-26

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