次声研究的现状和进展

本文综述了次声研究的国内外现状,指出了次声是目前地面车辆室内噪声的重要成分之一,空气的湍流和结构的次声频振动是次声的主要噪声源,阐明了把次声的听力阈值作为人在次声中暴露的允许声级的原因。本文还介绍了次声的频率计权特性、次声的听力保护装置、控制次声的措施和次声的应用。详细讨论了各种车辆室内次声产生的原因和传播的途径,提出了车内次声今后需研究的问题。

Present and Progress of Infrasound Studies

This paper makes a review about the present of infra-sound studies in different countries, and points out that the infrasonic noise is one of the present important components in vehicles and that air turbulence and structural vibration in infrasonic frequency region are the dominating infrasonic noise source. Meanwhile, this paper also expounds the reason which the hearing threshould of infrasound is used as the allowed level of the infrasound exposure. The different frequency weighting chracteristics and hearing protection devices of infrasound, method of reducing infrasonic noise, and applications of infrasound are introduced. The generation and propagation of infrasound inside vehicle are discussed in details, and problems to be studied further in future are proposed.