FR385844A - Microphone - Google Patents

Microphone

Info

Publication number
FR385844A
FR385844A FR385844DA FR385844A FR 385844 A FR385844 A FR 385844A FR 385844D A FR385844D A FR 385844DA FR 385844 A FR385844 A FR 385844A
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
Heinrich Birnbach
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 FR385844A publication Critical patent/FR385844A/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; DEAF-AID SETS; 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)
FR385844D 1907-12-31 1907-12-31 Microphone Expired FR385844A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR385844T 1907-12-31

Publications (1)

Publication Number Publication Date
FR385844A true FR385844A (fr) 1908-05-26

Family

ID=1431695

Family Applications (1)

Application Number Title Priority Date Filing Date
FR385844D Expired FR385844A (fr) 1907-12-31 1907-12-31 Microphone

Country Status (1)

Country Link
FR (1) FR385844A (fr)

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