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随着科学技术的发展和人民生活水平的提高,人们对各种机器及其零部件的噪声要求也更严了.为此,人们开始对各种机器及其零部件,制订了一系列的噪声标准.而为了准确地测出机器及其零部件的噪声量值,需要有一个适宜的声学环境,例如在消声室、混响室等声学实验室中进行测试.如果不具备这样的声学环境,往往是无法测得一台机器及其零部件的真实噪声量值的.例如,在工厂的生产线上或是一般的房间中,测试变速箱噪声时,会受到其它声源干扰以及墙壁和障碍物反射等的影响,所以直接采用声学测试方法就无法测出该变速箱的真实噪声.
With the development of science and technology and the improvement of people’s living standard, noise requirements of various machines and their components and parts have also been stricter, and people have started to make a series of noise tests on various machines and their components Standard.In order to accurately measure the noise level of the machine and its components, it is necessary to have a suitable acoustic environment, for example, in an acoustics laboratory such as an anechoic chamber, a reverberation chamber, etc. If such an acoustic environment is not available , It is often not possible to measure the true noise level of a machine or its components, for example, when testing gearbox noise on a production line in a factory or in a normal room, it can be disturbed by other sources as well as walls and obstacles Such as the impact of reflection, so the direct use of acoustic testing methods can not measure the true noise of the gearbox.