FR914880A - high frequency phone earphones - Google Patents

high frequency phone earphones

Info

Publication number
FR914880A
FR914880A FR914880DA FR914880A FR 914880 A FR914880 A FR 914880A FR 914880D A FR914880D A FR 914880DA FR 914880 A FR914880 A FR 914880A
Authority
FR
France
Prior art keywords
high frequency
frequency phone
earphones
phone earphones
phone
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
French (fr)
Inventor
Jean-Baptiste-Joseph Abadie
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 FR914880A publication Critical patent/FR914880A/en
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
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/10—Telephone receivers

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR914880D 1945-04-20 1945-04-20 high frequency phone earphones Expired FR914880A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR914880T 1945-04-20

Publications (1)

Publication Number Publication Date
FR914880A true FR914880A (en) 1946-10-21

Family

ID=9422501

Family Applications (1)

Application Number Title Priority Date Filing Date
FR914880D Expired FR914880A (en) 1945-04-20 1945-04-20 high frequency phone earphones

Country Status (1)

Country Link
FR (1) FR914880A (en)

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