According to the principle of resonance sound generation of air column , three different methods areused to measure the sound frequency when the pipe emits resonance sound by using Phyphox software. AfterFourier transformation of the measured data, select the most obvious sound frequency that is the same multipleof the fundamental frequency ,and use the linear fitting method to obtain the sound velocity of three different methods. The relative error between the measured results of sound velocity and the theoretical value of the threemethods is within 1.0%, which shows that the measurement method is feasible and the experiment isinteresting.