Measurement of sound velocity and its application in engineering

This article has introduced some applications of measuring sound velocity in engineering, including the measurement of elastic parameters of solids, ultrasonic temperature measurement, and the use of ultrasonic velocity to measure food quality. Certainly, with the advancement of technology, sound velocity measurement will be applied to many new fields. This article summarized several conventional methods for measuring sound velocity. This article used a dual-channel digital oscilloscope and phase comparison method to measure the ultrasonic velocity in air, the wavelength of ultrasound was measured by observing the Lissajous figure, and the measured value of sound velocity is relatively accurate. The time difference method for measuring sound velocity is widely applied in engineering, this article has provided a detailed introduction to the principle of the time difference method. In addition, the time difference method was utilized to measure the sound velocity in several metal materials. These two methods can conveniently measure sound velocity and have high measurement accuracy. Due to extensive applications in measuring sound velocity, enhancing the accuracy of measuring sound velocity is an important research direction.