Pawlaczyk-Luszczyńska M
Department of Physical Hazards, Nofer Institute of Occupational Medicine, Lódź, Poland.
Int J Occup Med Environ Health. 1999;12(2):159-76.
A short review of infrasound sources and effects on humans is presented. Polish standard PN-86/N-01338 and international standards ISO 7196:1995 and ISO 9612:1997 concerning the measuring techniques of infrasonic noise are described. The results of infrasonic noise measurements performed in the work environment in Poland are discussed. The study concerned the noise emitted by 124 different types of industrial machinery, appliances and means of transport. The measurements were made in typical working conditions with reference to Polish and international standards. The sound pressure levels exceeding Polish admissible values for: (a) workers' health protection were found in 5 (4.0%) cases, (b) ensuring proper conditions for performing basic functions in observational dispatcher cabins etc. in 77 (62.1%) cases; and (c) administration premises, design offices etc. in 92 (74.2%) cases. The admissible sound pressure levels for workers' health protection are in fact the permissible levels for hearing protection, however they do not correspond with the hearing threshold of infrasound the G-weighting characteristic is associated with. The hearing threshold of infrasound (G86 curve) was exceeded in 66.9% of all the industrial machinery and means of transport under study.
本文对次声源及其对人体的影响进行了简要综述。介绍了波兰标准PN - 86/N - 01338以及国际标准ISO 7196:1995和ISO 9612:1997中关于次声噪声测量技术的内容。讨论了在波兰工作环境中进行的次声噪声测量结果。该研究涉及124种不同类型的工业机械、设备和运输工具所发出的噪声。测量是在典型工作条件下参照波兰和国际标准进行的。发现声压级超过波兰规定值的情况如下：(a) 为保护工人健康，有5例（4.0%）；(b) 为确保在观测调度室等场所能正常执行基本功能，有77例（62.1%）；(c) 行政办公场所、设计办公室等，有92例（74.2%）。实际上，保护工人健康的允许声压级是听力保护的许可水平，但它们与次声的听力阈值（与G加权特性相关）并不对应。在所研究的所有工业机械和运输工具中，66.9%的情况超过了次声的听力阈值（G86曲线）。
