声音,本来是人类生活中必不可少的。但是在工业的发展中,却产生了一些有害于人们健康的声音,大家称之为噪声。防止噪声危害,是劳动保护工作中的一项重要内容。 一、噪声的量度和种类 对噪声的衡量,主要有强弱和频率两个方面。噪声的强弱,有客观的物理评价─—声压和声压级、声 Sound, it is essential in human life. However, in the development of industry, there have been some voices harmful to people’s health, which we all call noise. To prevent the noise hazard is an important part of labor protection work. First, the measurement and type of noise The measurement of noise, there are two main strengths and weaknesses and frequencies. The strength of noise, objective physical evaluation ─ ─ sound pressure and sound pressure level, sound