Emergency vehicle warning systems

Emergency vehicle warning systems

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The subject of visual and auditory warning devices (lights and sirens) for emergency and service vehicles is surveyed from a broad perspective. The report should provide directly useful information at all levels from the selection of hardware to a general understanding of the psychophysical factors determining the effectiveness of these devices. Topics covered include: an analysis of warning signals; the present situation and the need for uniform national standards; suggested performance standards for warning light systems and for sirens, including the reasons for the principal requirements; recommendations for actions that can be taken to improve the signal effectiveness of emergency vehicles; and brief summaries of some of the physical measurements that are made on a selection of lights and sirens.It is hoped that the use of the effective intensity measure in catalogs and promotional literature will become more common in the future and ... Thus, a strobe light with a peak intensity of 1 million candelas will probably have an effective flash intensity of about 100 to 1000 cd. ... Originally, all sirens operated in the aquot;manualaquot; mode; i.e., a switch (or mechanical clutch) was closed, causing the sound level toanbsp;...

Title:Emergency vehicle warning systems
Author:Arthur I. Rubin, Gerald Leonard Howett, Center for Building Technology, Law Enforcement Standards Laboratory, National Institute of Justice (U.S.)
Publisher: - 1981


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