BE496514A - - Google Patents

Info

Publication number
BE496514A
BE496514A BE496514DA BE496514A BE 496514 A BE496514 A BE 496514A BE 496514D A BE496514D A BE 496514DA BE 496514 A BE496514 A BE 496514A
Authority
BE
Belgium
Prior art keywords
microphone
relay
vehicle
intensity
acoustic
Prior art date
Application number
Other languages
English (en)
French (fr)
Publication of BE496514A publication Critical patent/BE496514A/fr

Links

Classifications

    • GPHYSICS
    • G08SIGNALLING
    • G08BSIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
    • G08B7/00Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
    • G08B7/06Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)
  • Emergency Alarm Devices (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
BE496514D BE496514A (oth)

Publications (1)

Publication Number Publication Date
BE496514A true BE496514A (oth)

Family

ID=139726

Family Applications (1)

Application Number Title Priority Date Filing Date
BE496514D BE496514A (oth)

Country Status (1)

Country Link
BE (1) BE496514A (oth)

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