Taylor W, Lempert B, Pelmear P, Hemstock I, Kershaw J
J Acoust Soc Am. 1984 Sep;76(3):807-19. doi: 10.1121/1.391305.
A-weighted equivalent continuous noise levels for hammer and press operations in a drop-forging industry were determined using both tape recordings of the noise and personal noise dosimeters. The results indicated average A-weighted Leq values of 108 dB for hammer operators and 99 dB for press operators. Comparison of hearing level statistics for 716 hammer and press operators and 293 control subjects indicated the severe hazard to hearing of impact noise exposures. For mean exposure times of less than 10 years, hearing levels for the press (99 dB) and hammer (108 dB) operator age groups are nearly identical, and in the latter case are less than those predicted for exposure to equivalent continuous noise. For long-term exposures of 10 years or more, the results of this study indicate that hearing losses resulting from impact noise in the drop-forging industry are as great or greater than those resulting from continuous noise.
在一家模锻行业中，通过使用噪声磁带录音和个人噪声剂量计来确定锤击和冲压操作的A加权等效连续噪声水平。结果表明，锤击操作员的平均A加权等效连续感觉噪声级（Leq）值为108分贝，冲压操作员为99分贝。对716名锤击和冲压操作员以及293名对照对象的听力水平统计数据进行比较，结果表明冲击噪声暴露对听力有严重危害。对于平均暴露时间少于10年的情况，冲压（99分贝）和锤击（108分贝）操作员年龄组的听力水平几乎相同，在后一种情况下低于等效连续噪声暴露所预测的水平。对于10年或更长时间的长期暴露，本研究结果表明，模锻行业中冲击噪声导致的听力损失与连续噪声导致的听力损失一样大或更大。
