Summary report on emergency vehicle sirens: prepared for the National Institute of Law Enforcement and Criminal Justice, Law Enforcement Assistance Administration, U.S. Department of Justice
Frank Edward Jones, T. L. Quindry, W. J. Rinkinen, National Institute of Law Enforcement and Criminal Justice
U.S. Dept. of Justice, Law Enforcement Assistance Administration, National Institute of Law Enforcement and Criminal Justice, 1975 - Medical - 47 pages
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23 test automobiles 3-octave 45 fc Hz A-Weighted Adjusted for Spherical anechoic chamber arithmetic mean sound attenuation Band Center Frequency Bureau of Standards Camp A.P. Hill Corliss and Jones5 Criminal Justice decibels destructive interference difference in DR directional response distance distribution effective loudness emergency vehicle sirens Enforcement and Criminal Enforcement Assistance Administration equation estimation f max f(max far-field field insertion loss four electronic sirens fundamental frequency geometric mean horizontal plane Institute of Law Law Enforcement Assistance Law Enforcement Standards LESL linear linear least squares loudness of 65 loudspeaker masked threshold masking noise level masking noise measurements maximum mean sound pressure microphone minicomputer National Bureau nine electromechanical sirens octave band phase cancellation plotted Required Signal Sound response and sound Route Segment Signal Sound Pressure Sine Wave siren signal sound sirens tested sound level sound power level sound pressure level spherical spreading subject vehicle test program Vi-octave band