2.7 At what level does sound become unsafe ?
Description
This article is from the Acoustics FAQ, by Andrew Silverman with numerous contributions by others.
2.7 At what level does sound become unsafe ?
It is best, where possible, to avoid any unprotected exposure to sound pressure levels above 100dB(A). Use hearing protection when exposed to levels above 85dB(A), especially if prolonged exposure is expected. Damage to hearing from loud noise is cumulative and is irreversible. Exposure to high noise levels is also one of the main causes of tinnitus. The safety aspects of ultrasound scans are the subject of ongoing investigation.
There are other health hazards from extended exposure to vibration. An example is "white finger", which is found amongst workers who use hand- held machinery such as chain saws.
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