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Noise induced hearing loss is due to exposure to chronic sound above 85dB (A) for more than 8 hrs / day. The stressor effect or the non-auditory effect of noise is associated with chronic sound which is generally below 70 dB(A).

The first causes hearing loss while the second if it interferes with communication, concentration or rest, may cause annoyance and other symptoms which lead to stress

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EU Noise Directives/ Regulations
Other Topics
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