BE433129A - - Google Patents

Info

Publication number
BE433129A
BE433129A BE433129DA BE433129A BE 433129 A BE433129 A BE 433129A BE 433129D A BE433129D A BE 433129DA BE 433129 A BE433129 A BE 433129A
Authority
BE
Belgium
Prior art keywords
telephone
amplifier
remote sensor
communications
microphone
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE433129A publication Critical patent/BE433129A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/21Combinations with auxiliary equipment, e.g. with clocks or memoranda pads
    • H04M1/215Combinations with auxiliary equipment, e.g. with clocks or memoranda pads by non-intrusive coupling means, e.g. acoustic couplers
    • H04M1/2155Acoustic coupling

Landscapes

  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Telephonic Communication Services (AREA)
  • Telephone Set Structure (AREA)
BE433129D BE433129A (en:Method)

Publications (1)

Publication Number Publication Date
BE433129A true BE433129A (en:Method)

Family

ID=92555

Family Applications (1)

Application Number Title Priority Date Filing Date
BE433129D BE433129A (en:Method)

Country Status (1)

Country Link
BE (1) BE433129A (en:Method)

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