FR321530A - Microphone - Google Patents

Microphone

Info

Publication number
FR321530A
FR321530A FR321530DA FR321530A FR 321530 A FR321530 A FR 321530A FR 321530D A FR321530D A FR 321530DA FR 321530 A FR321530 A FR 321530A
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
Mambret Georges
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 FR321530A publication Critical patent/FR321530A/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)
FR321530D 1902-05-29 1902-05-29 Microphone Expired FR321530A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR321530T 1902-05-29

Publications (1)

Publication Number Publication Date
FR321530A true FR321530A (fr) 1903-01-13

Family

ID=1371957

Family Applications (1)

Application Number Title Priority Date Filing Date
FR321530D Expired FR321530A (fr) 1902-05-29 1902-05-29 Microphone

Country Status (1)

Country Link
FR (1) FR321530A (fr)

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