scope:

This standard specifies methods for measuring and reporting the sound produced gy sound-making devices installed at fixed locations outdoors for the purpose of warning people of emergencies. The sound-making devices to which this standard is applicable include mechanical-electronic-and mechanical/electronic sirens that produces steady-tonal sounds with a nominal fundamental frequency in the range from 300 to 1000 Hz; when installed at a fixed location out doors in accordance with the manufacturer's recommendations.