The maximum allowable noise dose is
- a sustained noise level of exactly 85 dB for eight hours.
- any combination of noise and time which exceeds 90 dB TWA.
- a continuous noise exposure level of 70 dB for eight hours.
Explanation
The maximum permissible noise dose is expressed as a time-weighted average, so any combination of level and exposure time that exceeds roughly 90 dB TWA is unacceptable. Stating a fixed 85 dB for eight hours or 70 dB for eight hours ignores the level-versus-time trading that defines a noise dose.
sparkymarky asking:
Maximum allowable cannot be OVER 90db twa? Surely 90db twa IS the max, not something OVER this level?
Community Comments (1)
D
dimky Posts: 514 20.08.2016 / 22:34
Yes, 90db twa is the max.
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