一个圆盘由细线垂直悬挂在声场中，该装置可以通过绕轴旋转以测量声音的强度，构成简易的瑞利盘. 本文从场论角度对此现象进行了理论分析和修正，分析了声强和圆盘旋转角度的关系. 通过定标等实验对该装置的精度进行了深入研究，解释了相关参量对瑞利盘精度的影响，并确定了设计瑞利盘装置的最优参数.

 When a disc is suspended vertically by thin lines in sound field, this device can be rotated around an axis to measure the intensity of sound and a simple Rayleigh disk. In this paper, this phenomenon is theoretically analyzed and modified from field theory point of view. The relationship between sound intensity and rotation angle of disk is analyzed. The accuracy of the device is studied deeply through calibration experiments. The influence of relevant parameters on the accuracy of Rayleigh disk is explained. The optimal parameter for designing the Rayleigh disk device is determined.