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In Reply to: RE: Too loud... posted by Todd A. on February 19, 2015 at 13:32:09
The OSHA chart starts at 90db
Permissible Noise Exposures
Duration per day, in hours/ Sound level in dB*
8 / 90
6 / 92
4 / 95
3 / 97
2 / 100
1.5 / 102
1 / 105
0.5 / 110
0.25 or less/ 115
*When measured on the A scale of a standard sound level meter at slow response. Source: 29 CFR 1910.95, Table G-16.
I think you were being too conservative, which is better than not being so. I think the type of sound and ones age play a role as well.
E
T
Follow Ups:
"Sound is measured in units called decibels. Sounds of less than 75 decibels, even after long exposure, are unlikely to cause hearing loss. However, long or repeated exposure to sounds at or above 85 decibels can cause hearing loss. The louder the sound, the shorter the amount of time it takes for NIHL to happen."
From The National Institute on Deafness and Other Communication Disorders (NIDCD) website.
I'm guessing that there's some pressure to keep the exposure levels listed on OSHA somewhat higher, but can't be certain what the reason is for the discrepancy.
Yes the OSHA numbers face pressure from business and is why I consider them at the limit. But "above 85 db" from NIH isn't a lot different than the OSHA numbers. I wouldn't do 100dB for two hours like the OSHA chart has.Also the nature of music which is mostly everchanging in level unless you listen to compressed pop is different than noise which is most often constant and varies little or not all all in the case of an engine etc.
E
T
Edits: 02/20/15
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