FR624491A - écouteur microphonique - Google Patents

écouteur microphonique

Info

Publication number
FR624491A
FR624491A FR624491DA FR624491A FR 624491 A FR624491 A FR 624491A FR 624491D A FR624491D A FR 624491DA FR 624491 A FR624491 A FR 624491A
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 FR624491A publication Critical patent/FR624491A/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
    • H04R21/023—Microphones with more than one granular chamber

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR624491D 1926-11-12 1926-11-12 écouteur microphonique Expired FR624491A (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR624491T 1926-11-12

Publications (1)

Publication Number Publication Date
FR624491A true FR624491A (fr) 1927-07-19

Family

ID=8987127

Family Applications (1)

Application Number Title Priority Date Filing Date
FR624491D Expired FR624491A (fr) 1926-11-12 1926-11-12 écouteur microphonique

Country Status (1)

Country Link
FR (1) FR624491A (fr)

Similar Documents

Publication Publication Date Title
FR616738A (fr) Haut-parleur
FR32220E (fr) Haut-parleur
FR624491A (fr) écouteur microphonique
FR642963A (fr) Microtéléphone
FR29279E (fr) Microphone perfectionné
FR617464A (fr) Haut-parleur
FR645292A (fr) Microphone
FR658425A (fr) Microphone perfectionné
FR667002A (fr) Microtéléphone
FR615657A (fr) écouteur électro-magnétique
FR634878A (fr) Haut-parleur
DK43222C (da) Mikrofon.
FR32665E (fr) Haut-parleur
FR606696A (fr) Haut-parleur
FR632295A (fr) Haut-parleur
FR623891A (fr) Haut-parleur
FR611814A (fr) Haut-parleur
FR621997A (fr) Haut-parleur
FR631211A (fr) Haut-parleur
FR638086A (fr) Haut-parleur
FR685087A (fr) écouteur microphonique
FR609250A (fr) Amplificateur téléphonique
FR627370A (fr) Capsule téléphonique ou microphonique
FR632091A (fr) Haut-parleur perfectionné
SU4487A1 (ru) Конденсаторный микрофон