BE465120A - - Google Patents

Info

Publication number
BE465120A
BE465120A BE465120DA BE465120A BE 465120 A BE465120 A BE 465120A BE 465120D A BE465120D A BE 465120DA BE 465120 A BE465120 A BE 465120A
Authority
BE
Belgium
Prior art keywords
sound
vibratory
amplification
acoustic
damping
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE465120A publication Critical patent/BE465120A/fr

Links

Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04MTELEPHONIC COMMUNICATION
    • H04M1/00Substation equipment, e.g. for use by subscribers
    • H04M1/02Constructional features of telephone sets
    • H04M1/19Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
    • 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

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Soundproofing, Sound Blocking, And Sound Damping (AREA)
BE465120D BE465120A (enrdf_load_stackoverflow)

Publications (1)

Publication Number Publication Date
BE465120A true BE465120A (enrdf_load_stackoverflow)

Family

ID=116778

Family Applications (1)

Application Number Title Priority Date Filing Date
BE465120D BE465120A (enrdf_load_stackoverflow)

Country Status (1)

Country Link
BE (1) BE465120A (enrdf_load_stackoverflow)

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