Article | REF: G2720 V1

Effect of noise on humans

Author: Jacques JOUHANEAU

Publication date: October 10, 2008

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2. Auditory effects of noise

2.1 Discomfort

The loudness scales that characterize the subjective intensity of perceived sounds can be obtained either by comparing a pure tone of any frequency with a 1,000 Hz tone giving the same level sensation (phone scale), or by pairwise comparison of sounds of the same frequency, one of which gives a level sensation twice that of the other (sones scale). Both forms of analysis reveal non-linearities in intensity perception in relation to the physical level of the stimulus.

So a 60 dB sound at 2,000 Hz will be judged twice as intense as a 50 Hz sound at the same level.

It is precisely to take account of this auditory filtering effect that weighting curves have been introduced. Their role...

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Auditory effects of noise