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一、前言随着工作机械对高速、高功率等方面的要求越来越严格,更由于辅设了多种附属装置,生产系统中的噪音随之增大。因此操作者或高精度机械造成噪音出现的机会也增加了。关于工作机械噪音的规范,国际上有ISOR495,许多国家又有自己的规范;如美国的NMTBA、英国的BS4813、西德的DIN45635,法国的NFS30—006、澳大利亚的SAA1217—1972、苏联的FOCT11870—66等。但是由于各自采用了多种不同的测量方法,能确定许用值的很少。通常,在确定噪音规范的测量中,噪音的emission(音源发出的音量)对静止音源来说用声力水平(PWL),而对移动音源用音压水平(SPL)来表示较为适宜。噪音的immission(观测者耳边的声音)用音压水平表示被认为是恰当的。
I. INTRODUCTION With the increasingly stringent requirements on high-speed and high-power work machines, the noise in the production system is increased due to the auxiliary auxiliary devices. As a result, the chances of the operator or high-precision machinery causing noise to appear have also increased. On the norms of working machinery noise, the international ISOR495, many countries have their own norms; such as the United States NMTBA, Britain’s BS4813, West Germany’s DIN45635, France’s NFS30-006, Australia’s SAA1217-1972, the Soviet Union’s FOCT11870- 66 and so on. However, due to the fact that many different measurement methods are used, the allowable value can be determined very little. Normally, emission of noise (volume of sound emitted by a sound source) is used to measure sound level (PWL) for stationary sound sources and sound pressure level (SPL) of moving sound sources for determination of noise specifications. The immission of noise (the ear of the observer) is said to be appropriate at the level of the sound pressure.