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AtVtV& <br />Re/iabi/ity, fl/RECT <br />www. re I i a b i I i ty d i re ctsto r e. co m <br />2911 South Shore Bivd. Suite 170, League City, TX USA 77573 Phone: 281-957-5283 Fax: 281-3344255 <br />Sound Level Decibel Loudness Comparison Chart <br />Environmental Noise <br />Weakest sound heard <br />Od8 <br />' Whisper Quiet Library <br />30dB <br />Normai conversation (3-5') <br />60-70dB <br />Telephone dial tone <br />80d6 <br />City Traffic (inside car) <br />85de <br />Train whistie at 500', Truck Traffic <br />90d6 <br />Subway train at 200' <br />95dB <br />Level at which sustained exposure may result in <br />hearing loss <br />90 - 95dB <br />Power mower at 3' <br />107dB <br />Snowmobile, Motorcycle <br />100d6 <br />Power saw at 3' <br />110dB <br />Sandblasting, Loud Rock Concert <br />115d6 <br />Pain begins <br />125d8 <br />Pneumatic riveter at 4' <br />125dB <br />Even short term exposure can cause permanent <br />damage - Loudest recommended exposure WITH <br />140d8 <br />hearing protection <br />Jet engine at 100', Gun Biast <br />140dB <br />Death of hearing tissue <br />180dB <br />Loudest sound possible <br />194d6 <br />OSHA Daily Permissible Noise Level Exposure <br />Hours per day <br />Sound level <br />8 <br />90dB <br />6 <br />_ 92d6 <br />4 <br />95dB <br />3 <br />97dB <br />Z <br />100dB <br />1.5 <br />102d6 <br />1 <br />105d6 <br />,5 <br />110d6 _ <br />.25 or less <br />115d6 <br />41 <br />