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Appendix D OSHA Regulations
Pages 141-142

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From page 141...
... When noise levels are determined by octave band analysis, the equivalent A-weighted sound level may be determined as follows (Figure G-9~: 140 130 m ~ 120, _ IL 11Om ~ DO 90 80 - _ i\// ll ~ 00 200 125 120 m 115 11O ~ o 105 ~ .= ~ 00 A, 95 uu on ll 1 1 1 1 1 1 1 11 1 1 1 1 1 1 1 1 11 500 1,000 2,O00 4,000 8,OOO Band Center Frequency (Hz) FIGURE G-9 - Equivalent A-Weighted Sound Level 2 www.osha-slc.gov/OshStd_data/1910_0095.html, accessed 916199.
From page 142...
... Cn indicates the total time of exposure at a specified noise level, and Tn indicates the total time of exposure permitted at that level. Exposure to impulsive or impact noise should not exceed 140 dB peak sound pressure level.


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