American National Standard Methods for the Field Measurement of the Sound Output of Audible Public Warning Devices Installed at Fixed Locations Outdoors
美国国家标准室外固定位置安装的声音公共警报装置声音输出的现场测量方法
Describes relatively simple procedures for measurement & reporting certain properties of sounds produced by audible public warning devices. Methods are given for the measurement of the "C"-weighted sound level & for determining the 1/3 octave band, etc.