Emergency Vehicle Warning Devices: Interim Review of the State-of-the-art Relative to Performance Standards, Volume 501
U.S. Department of Justice, National Institute of Law Enforcement and Criminal Justice, 1972 - Signals and signaling, Automobile - 73 pages
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100 meter range A-weighted ambient amplifier analysis anechoic chamber Automotive Engineers axis background calibration channel characteristics chromaticity coordinates circuit color color temperature complex reaction condensor microphone dB(A determined driver effective intensity emergency vehicle warning emergency warning lights filters flashing light goniometer horizontal illuminance instrumentation intensity distribution Law Enforcement light source lighting unit linear located luminous intensity mechanical siren microphone minimum inverse square mounted noise operated output parabolic reflector performance standards photocell photometer bar photometric measurements photometric testing photosensor pistonphone potentiometer preamplifier procedure produced by sirens projected dimension radiation patterns recognition distance reflector rH rH rH rotating SAE Standard sample sector disk simulation siren signal Society of Automotive sound levels produced sound pressure level spectral standard lamp target vehicle temperature test light test section test unit test vehicle traffic tristimulus vehicle warning devices voltage Warning Lamp warning signals