FR470954A - Microphone - Google Patents

Microphone

Info

Publication number
FR470954A
FR470954A FR470954DA FR470954A FR 470954 A FR470954 A FR 470954A FR 470954D A FR470954D A FR 470954DA FR 470954 A FR470954 A FR 470954A
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)
Inventor
Louis Lumiere
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
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 Individual filed Critical Individual
Application granted granted Critical
Publication of FR470954A publication Critical patent/FR470954A/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)
FR470954D 1913-06-28 1913-06-28 Microphone Expired FR470954A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR470954T 1913-06-28

Publications (1)

Publication Number Publication Date
FR470954A true FR470954A (fr) 1914-10-08

Family

ID=1509259

Family Applications (1)

Application Number Title Priority Date Filing Date
FR470954D Expired FR470954A (fr) 1913-06-28 1913-06-28 Microphone

Country Status (1)

Country Link
FR (1) FR470954A (fr)

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