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本文通过在噪声测试中对相对比较测试法求环境修正值K的公式中的问题,测试中的误差分析和举例,说明了在选取两个相对的测量表面时要注意其声压级的差值。若其差值大于2dB、2.5dB、或3dB,则环境修正值K的误差分别为dk<1.7dB、<1.3dB、或<1dB。这对提高相对比较测试法的测量精确度有着重要的实际意义。当然这理论还需要有更多的测量来检验其正确性,以求得进一步的完善,但是不应该因为它测试中出现了某些较大的误差而抛弃之。这些就是本文的意图。
In this paper, the noise test in the relative comparison test method to find the environmental correction value K formula in the error analysis and examples of the test shows that in the selection of two relative measurement surface should pay attention to the difference between the sound pressure level . If the difference is greater than 2dB, 2.5dB, or 3dB, the error of the environmental correction value K is dk <1.7dB, <1.3dB, or <1dB, respectively. This is of great practical significance for improving the measurement accuracy of the comparative test method. Of course, this theory also needs more measurements to test its correctness for further improvement, but it should not be discarded because of some big error in its testing. These are the intent of this article.