Ten audible warning signals, selected by the police scientific development branch as alternatives to the current signal, were evaluated in the laboratory in comparison with the conventional signal as to their "attention getting" effect. Forty-two subjects were required to detect signals of rising intensity against a background of in-car noise whilst also carrying out a tracking task. The main conclusion of the study is that a significant improvement over the conventional signal can be achieved. It is also recommended that any change in audible warning signals should be applied to all appropriate vehicles.(a) (TRRL)

  • Availability:
  • Corporate Authors:

    IPC Science and Technology Press Limited

    IPC House, 32 High Street
    Guildford, Surrey  England 
  • Authors:
    • McClelland, I L
  • Publication Date: 1980-9

Media Info

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Filing Info

  • Accession Number: 00329593
  • Record Type: Publication
  • Source Agency: Transport Research Laboratory
  • Report/Paper Numbers: HS-030 910
  • Files: HSL, ITRD, TRIS
  • Created Date: May 21 1983 12:00AM