一种改进瑞利盘测量声强的方法  

An Improved Method for Measuring Sound Intensity Using the Rayleigh Disk

作　　者：任欣欣 买子桐 陶诗华 赵煜捷 贺西平[1] REN Xinxin;MAI Zitong;TAO Shihua;ZHAO Yujie;HE Xiping(School of Physics and Information Technology,Shaanxi Normal University,Xi’an 710119,China)

机构地区：[1]陕西师范大学物理学与信息技术学院,陕西西安710019

出　　处：《大学物理实验》2025年第1期64-68,共5页Physical Experiment of College

基　　金：国家级大学生创新训练项目(202310718045);国家自然科学基金(12174241)。

摘　　要：提出了一种测量瑞利盘转动频率来确定声强级的改进的测量声强的方法。理论分析了圆盘在平面波声场中的运动,推导得到其转动微分方程,数值计算了瑞利盘转动角度的时域图和频域图及不同声强级声场中圆盘的平衡位置。根据转动角度的频域图,得到不同参数瑞利盘的声强级-转动频率关系曲线。对不同悬线直径的瑞利盘进行测试,实验结果与理论计算符合,相对误差在0.01%~3.03%之间,尤其在高声强级范围内表现出更高精度。与传统利用复杂光学系统测量圆盘转动平衡位置的方法相比,该方法操作简便、精度更高。A new method for measuring the sound intensity level(SIL)using a rotating Rayleigh disk is proposed.The theoretical analysis of the motion of the disk in a plane wave sound field is presented,and the differential equation of the disk′s rotation is derived.The time-domain and frequency-domain diagrams of the disk′s rotation angle and the equilibrium position of the disk under different SIL sound fields are numerically calculated.Based on the frequency domain diagram of the disk′s rotation angle,the SIL and rotation frequency relationship curve of different parameters Rayleigh disk is obtained.The experimental results of different wire diameter Rayleigh disks are tested,and the experimental results are consistent with the theoretical calculation,with a relative error of 0.01%-3.03%between them,especially in the high SIL range,showing higher precision.Compared with the traditional method of measuring the equilibrium position of the disk by using a complex optical system,this method is more convenient and has higher precision.

关 键 词：瑞利盘 声强级 数值计算 转动频率 

分 类 号：O4-39[理学—物理]