FR541706A - Microphone sélectif - Google Patents

Microphone sélectif

Info

Publication number
FR541706A
FR541706A FR541706DA FR541706A FR 541706 A FR541706 A FR 541706A FR 541706D A FR541706D A FR 541706DA FR 541706 A FR541706 A FR 541706A
Authority
FR
France
Prior art keywords
selective microphone
microphone
selective
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
Ezechiel Weintraub
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 filed Critical
Application granted granted Critical
Publication of FR541706A publication Critical patent/FR541706A/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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR541706D 1921-03-31 1921-03-31 Microphone sélectif Expired FR541706A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR541706T 1921-03-31

Publications (1)

Publication Number Publication Date
FR541706A true FR541706A (fr) 1922-08-01

Family

ID=8930352

Family Applications (1)

Application Number Title Priority Date Filing Date
FR541706D Expired FR541706A (fr) 1921-03-31 1921-03-31 Microphone sélectif

Country Status (1)

Country Link
FR (1) FR541706A (fr)

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