Industrial impact noise: Description and definition
John Erdreich, Thomas Doyle, Steve Spaeth · The Journal of the Acoustical Society of America · 1982
In order to define the practical requirements of instrumentation for the measurement of industrial impact noise and to determine common parameters of industrial impact noise which should be considered in the study of the biological effects of such noise, survey measurements were made in industries which produce impulse noise. The measurements were made to include a bandwidth from 10 Hz to 40 kHz and a dynamic range of either 42 or 72 dB, for analog and direct digital recording, respectively. From the impact noise samples, we calculated true rms sound pressure level for the burst, peak-level, crest factor based on burst duration, and 1-s equivalent continuous level. Dose based on 3-dB/doubling and 5-dB/doubling A-weighted slow response and A-weighted fast response was calculated also. We will discuss the descriptors of impuse noise and also present preliminary data which address the variability of impulse noise signatures from the same process and the same machine.