HOW WELL CAN AUDIBLE WARNING DEVICES OF EMERGENCY VEHICLES BE LOCATED BY THE DRIVER OF AN AUTOMOBILE

It was considered extremely useful to conduct an experiment to determine whether or not the directivity detection of emergency vehicle audible warning devices is a significant function in optimizing these devices. If the experiments indicated that automobile drivers cannot successfully determine the direction of the emergency signal, then there would be no need to perform phase measurements at the ears of drivers in the examination of the interior noise and the insertion loss of the body of vehicles that forms the basis for the optimization study. Accordingly, a series of direction determination experiments were performed, as described in the next section. It was concluded that aural localization of the direction of emergency vehicles is not practicable. Accordingly, complex measurements, such as the determination of the phase difference of the signal at both ears of the driver are not justified in the basic study of optimizing the audible warning devices of emergency vehicles.

  • Supplemental Notes:
    • Sponsored by the Society of Automotive Engineers. Paper G- 14 to the 91st meeting of the Acoustical Society of America, Washingtin, D.C. April, 1976.
  • Corporate Authors:

    Bolt, Beranek and Newman, Incorporated

    1740 Ogden Avenue
    Downers Grove, IL  USA  60515
  • Authors:
    • Potter, R C
    • Pei, H S
  • Publication Date: 1976-4

Media Info

  • Features: Figures; References; Tables;
  • Pagination: 17 p.

Subject/Index Terms

Filing Info

  • Accession Number: 00152380
  • Record Type: Publication
  • Source Agency: National Safety Council Safety Research Info Serv
  • Files: TRIS
  • Created Date: May 31 1977 12:00AM