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对于在工业区安装的大型机械声功率的测定,有若干种不同的技术;而在每种技术中,声功率级都是根据测量得的声压级计算出来的。计算结果的准确性取决于声压级测量的正确性。但由于测量区域内声音特性对声压级影响极大,所以即使测量和计算本身非常准确,但最终结果不一定准确。为了测定声功率级,人们设想出多种技术,来确定声压级测量过程中周围环境的影响,而且最终测量结果的准确性几乎完全取决于对周围环境影响测定的准确程度。
There are several different techniques for the determination of large mechanical sound power installed in industrial areas; in each technique, the sound power level is calculated from the measured sound pressure level. The accuracy of the calculation results depends on the correctness of the sound pressure level measurement. However, the sound characteristics in the measurement area greatly affect the sound pressure level, so even though the measurement and calculation themselves are very accurate, the final result may not be accurate. In order to determine the sound power level, a number of techniques have been devised to determine the environmental impact of the sound pressure level measurement, and the accuracy of the final measurement result almost entirely depends on the accuracy of the measurement of the surrounding environment.