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多年来,在噪声控制和声功率评价方面,利用传统的声压法,一般不能获得预想的结果,因为传声器所检测到的是声场中某点的声压值,它受到多噪声源、混响及近场效应等因素的影响。如测量机器的辐射声功率,或者是通过声压折算,再进行某种现场条件的修正;或者是需要特定的声学环境如消声室、混响室等。尤其是某些对象,如齿轮箱等,它的运转需要一定的动力源和负载,就要考虑声源隔离的问题,这在现场中是难以解决的。
Over the years, traditional sound pressure methods have generally failed to yield the desired results for noise control and sound power evaluation because the microphone detects the sound pressure level at a point in the sound field, which is affected by multiple noise sources, reverberation And near-field effects and other factors. Such as measuring the machine’s radiated sound power, or by sound pressure conversion, and then modify some of the site conditions; or need specific acoustic environment such as anechoic chamber, reverberation room. In particular, some objects, such as gearboxes, etc., require a certain amount of power source and load to operate. Therefore, it is necessary to consider the issue of sound source isolation, which is difficult to solve in the field.