▲ U.S. Department of Labor, Occupational Safety and Health Administration ▲
| #4094956 in Books | Labor U S Department of | 2014-03-19 | Original language:English | PDF # 1 | 9.00 x.8 x6.00l,.13 | File Name: 1497388139 | 32 pages | Hearing Conservation
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Noise, or unwanted sound, is one of the most pervasive occupational health problems. It is a by-product of many industrial processes. Sound consists of pressure changes in a medium (usually air), caused by vibration or turbulence. These pressure changes produce waves emanating away from the turbulent or vibrating source. Exposure to high levels of noise causes hearing loss and may cause other harmful health effects as well. The extent of damage depends primarily on the ...
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