FR685087A - écouteur microphonique - Google Patents

écouteur microphonique

Info

Publication number
FR685087A
FR685087A FR685087DA FR685087A FR 685087 A FR685087 A FR 685087A FR 685087D A FR685087D A FR 685087DA FR 685087 A FR685087 A FR 685087A
Authority
FR
France
Prior art keywords
microphone earpiece
earpiece
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
Andre-Auguste Gillet
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 FR685087A publication Critical patent/FR685087A/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
    • H04R25/00—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception
    • H04R25/04—Deaf-aid sets, i.e. electro-acoustic or electro-mechanical hearing aids; Electric tinnitus maskers providing an auditory perception comprising pocket amplifiers

Landscapes

  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Neurosurgery (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR685087D 1929-10-30 1929-10-30 écouteur microphonique Expired FR685087A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR685087T 1929-10-30

Publications (1)

Publication Number Publication Date
FR685087A true FR685087A (fr) 1930-07-04

Family

ID=9024808

Family Applications (1)

Application Number Title Priority Date Filing Date
FR685087D Expired FR685087A (fr) 1929-10-30 1929-10-30 écouteur microphonique

Country Status (1)

Country Link
FR (1) FR685087A (fr)

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