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各种生产用的机械设备发出的强大噪声污染了环境,因此必须加以控制,在控制前后均有噪声测量问题.即使家用器具(如缝纫机、洗衣机和电冰箱等)发出的噪声亦会影响人们的工作、学习和休息.噪声的大小还反映产品的内在质量,例如零部件的加工精度和装配水平.这些都需要标准化的噪声测量方法来鉴定,以便相互比较和研究低噪声产品.为此国际标准化组织(ISO)从1975年起陆续制订了
The noise generated by machinery and equipment of various kinds is polluting the environment and therefore must be controlled with noise measurements both before and after control. Even noise emitted by household appliances such as sewing machines, washing machines and refrigerators can affect people’s Work, study and rest. The size of the noise also reflects the intrinsic quality of the product, such as machining accuracy and assembly level of components, which need to be standardized to measure the noise to identify, in order to compare and study low noise products.To this end the international standardization Organization (ISO) from 1975 onwards