FR443236A - Microphone - Google Patents

Microphone

Info

Publication number
FR443236A
FR443236A FR443236A FR443236DA FR443236A FR 443236 A FR443236 A FR 443236A FR 443236 A FR443236 A FR 443236A FR 443236D A FR443236D A FR 443236DA FR 443236 A FR443236 A FR 443236A
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
FR443236A
Other languages
English (en)
Inventor
Guillaume Arnaud Nussbaum
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 FR443236A publication Critical patent/FR443236A/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)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
FR443236A 1911-05-13 1912-05-02 Microphone Expired FR443236A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB191111610T 1911-05-13

Publications (1)

Publication Number Publication Date
FR443236A true FR443236A (fr) 1912-09-19

Family

ID=32499463

Family Applications (1)

Application Number Title Priority Date Filing Date
FR443236A Expired FR443236A (fr) 1911-05-13 1912-05-02 Microphone

Country Status (2)

Country Link
FR (1) FR443236A (fr)
GB (1) GB191111610A (fr)

Also Published As

Publication number Publication date
GB191111610A (en) 1911-12-14

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