FR620329A - Loudspeaker telephone receiver - Google Patents

Loudspeaker telephone receiver

Info

Publication number
FR620329A
FR620329A FR620329DA FR620329A FR 620329 A FR620329 A FR 620329A FR 620329D A FR620329D A FR 620329DA FR 620329 A FR620329 A FR 620329A
Authority
FR
France
Prior art keywords
telephone receiver
loudspeaker telephone
loudspeaker
receiver
telephone
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
Maurice Mars
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 FR620329A publication Critical patent/FR620329A/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/20—Arrangements for obtaining desired frequency or directional characteristics
    • H04R1/22—Arrangements for obtaining desired frequency or directional characteristics for obtaining desired frequency characteristic only 
    • H04R1/24—Structural combinations of separate transducers or of two parts of the same transducer and responsive respectively to two or more frequency ranges

Landscapes

  • Health & Medical Sciences (AREA)
  • Otolaryngology (AREA)
  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
FR620329D 1925-12-21 1925-12-21 Loudspeaker telephone receiver Expired FR620329A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR620329T 1925-12-21

Publications (1)

Publication Number Publication Date
FR620329A true FR620329A (en) 1927-04-20

Family

ID=8984324

Family Applications (1)

Application Number Title Priority Date Filing Date
FR620329D Expired FR620329A (en) 1925-12-21 1925-12-21 Loudspeaker telephone receiver

Country Status (1)

Country Link
FR (1) FR620329A (en)

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