基于声速测量实验现象和测量数据，提出了一个共振频率拟合模型和声波在发生端和接收端多次反射叠加形成干涉的声波的锥面传播衰减物理模型．根据以上模型推导声压幅度和相位公式，编写程序并且根据实测数据进行了拟合和验证，获得了必要参数．结果表明锥面波模型无论是在共振干涉法还是相位比较法的实验数据与推导的公式都较好的符合，拟合获得的参数为声速测量饰演的教学和虚拟仿真系统的搭建提供了理论指导．

Based on the experimental phenomena and measurement data of sound speed, a resonance frequency fitting model and a physical model of sound wave cone-shaped propagation attenuation formed by multiple reflections and superposition of sound waves at the source and receiver ends are proposed. According to the above models, the formulas for sound pressure amplitude and phase are derived, and a program is written and verified with actual measured data, obtaining the necessary parameters. The results show that the cone wave model is well consistent with the experimental data of both the resonance interference method and the phase comparison method, and the derived parameters provide theoretical guidance for the teaching of sound speed measurement and the construction of virtual simulation systems.