Jan 1 2014, 11:20 AM
Noise should be controlled below a level equivalent to 85 dBA for eight hours to minimise noise induced hearing loss. When the noise level is increased by 5 dBA, the amount of time a person can be exposed to a certain noise level to receive the same dose is cut in half.
[UPDATED 11/17/05]Headphone FAQ, read this, check it, before you buy one.
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