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一、概述近年来开始采用声功率级来表征机器的噪声水平.ISO/TC43将机器声功率级测量分为精密级、工程级和概测级三种,不同的测量精度,要求不同的测试环境.较理想的测试环境是消声室、半消声室或混响室,但设计建造这些专用试验室投资大,建设周期长.对于多数工厂企业来说,建造专门的声学试验室是受到条件的限制的,这可以采用工程级或概测级在现场进行测试分析,并按规定方法对测量结果加以修正,以表示机器设备“真正”的声功率级.声功率级需要专门仪器测量,目前多半是利用声级计等仪器测
First, an overview In recent years began to use the sound power level to characterize the noise level of the machine.ISO / TC43 machine sound power level measurement is divided into precision, engineering and general level of three, different measurement accuracy, requires a different test environment The ideal test environment is anechoic chamber, semi-anechoic chamber or reverberation chamber, but the design and construction of these specialized laboratories has a large investment and long construction period.For most industrial enterprises, the construction of specialized acoustic laboratories is subject to conditions , Which can be tested on site using engineering or probabilistic levels and the results corrected to indicate the “true” sound power level of the equipment, which requires specialized instrumentation and currently Mostly the use of sound level meter and other equipment measured