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通过对3个吸声构件进行了多测点的混响室吸声测量的实验结果进行分析,发现旋转扩散体静止在不同角度状态对测量结果有显著影响,进而提出同一测点在多个旋转扩散体的角度状态下进行测量的测量方法。并使用这一测量方法,比较了混响室顶角测点位置和与按照ISO标准和国标要求选择的空间测点位置所得的测量结果,分析得出顶角测点和空间测点的平均结果是一致的,且顶角位置处的测量结果拥有更小的离散度。因此可以在矩形混响室角落设置少量测点,通过改变旋转扩散体角度状态进行混响室吸声测量。
The results of the experiment on the sound absorption measurement of the reverberation chamber with three measuring points were analyzed. It was found that the static state of the rotating diffuser at different angles had a significant effect on the measurement results. Then, Diffusers angle measurement of measurement methods. And using this measurement method, the measurement results of the measurement points of the top corner of the reverberation chamber and the measurement points of the space selected according to ISO standards and national standard requirements are compared, and the average results of the measurement points of the top corner and the space are obtained Are consistent and the measurements at the apex position have a smaller dispersion. Therefore, a small number of measuring points can be set in the corner of the reverberation chamber and the sound absorption measurement of the reverberation chamber can be performed by changing the angle state of the rotating diffuser.