Kurtosis corrected sound pressure level as a noise metric for risk assessment of occupational noises
Kurtosis corrected sound pressure level as a noise metric for risk assessment of occupational noises
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DOI：
10.1121/1.3533691
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发表时间：
2011-03-01
影响因子：
2.4
通讯作者：
Kim, Jay H.
中科院分区：
文献类型：
--
作者：
Goley, G. Steven;Song, Won Joon;Kim, Jay H.
目前的噪声指南使用基于能量的噪声度量来预测听力损失的风险，因此忽略了噪声的时间特性的影响。这种做法被广泛认为低估了复杂噪声环境的风险，其中脉冲噪声嵌入稳态噪声中。通过结合等效声压级（SPL）和定义为噪声峰度函数的时间校正项，设计了噪声度量的基本形式。通过改变这种基本形式开发了几种噪声度量，并利用现有的灰鼠噪声暴露数据进行了评估。结果表明，峰度校正项显着提高了噪声度量与测得的灰鼠听力损失的相关性。噪声的频率分量的平均SPL（其定义具有峰度校正项的听力损失）被识别为测试中的最佳噪声度量。研究的指标之一，峰度校正的A加权SPL，被应用到人体暴露研究数据作为预览应用的指标，人类的指南。将噪声度量应用于人类准则的可能性进行了讨论。(C)2011年美国声学学会。[DOI：10.1121/1.3533691]
Current noise guidelines use an energy-based noise metric to predict the risk of hearing loss, and thus ignore the effect of temporal characteristics of the noise. The practice is widely considered to underestimate the risk of a complex noise environment, where impulsive noises are embedded in a steady-state noise. A basic form for noise metrics is designed by combining the equivalent sound pressure level (SPL) and a temporal correction term defined as a function of kurtosis of the noise. Several noise metrics are developed by varying this basic form and evaluated utilizing existing chinchilla noise exposure data. It is shown that the kurtosis correction term significantly improves the correlation of the noise metric with the measured hearing losses in chinchillas. The average SPL of the frequency components of the noise that define the hearing loss with a kurtosis correction term is identified as the best noise metric among tested. One of the investigated metrics, the kurtosis-corrected A-weighted SPL, is applied to a human exposure study data as a preview of applying the metrics to human guidelines. The possibility of applying the noise metrics to human guidelines is discussed. (C) 2011 Acoustical Society of America. [DOI: 10.1121/1.3533691]