Abstract
The effects of some temporal factors of nonsteady noise on annoyance
was investigated by means of six experiments. The factors are rising
speed, fluctuation speed, fluctuation frequency, and fluctuation
deviation. The results show that the ratio of annoyance and the rising
speed are in linear relation in log-log coordinates and the annoyance
increase with the increase of rising speed from 25 to 1000 dB/s corresponds
to the increase of sound pressure level of 2.6 dB. The fluctuation
speed, the fluctuation frequency, and the fluctuation deviation have
little effect on annoyance provided the equivalent sound level (Leq)
is constant. The validity of some rating scales of fluctuating noise
is discussed on the basis of the present experimental results.
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