Based on the standing-wave acoustic velocimetry in university physics experiments，this paper delves into the differences in reflection characteristics of sound waves between audible-frequency measurements and ultrasonic measurements during sound velocity determination．By constructing a general model that describes finite reflections of audible sound waves，the study combines experimental data with quantitative fitting analysis to reveal the impact of reflection counts on sound velocity measurement results．The research finds that in practical measurements，the reflections of sound waves between S1 and S2 do not form an ideal standing wave state．Instead，the sound pressure signal received at S2 is the result of multiple reflections overlapping．Further analysis shows that when the reflection count n exceeds 3，the contribution of subsequent reflections to the signal received at S2 becomes negligible．The model developed in this study aligns well with experimental data obtained using the standing wave method for measuring audible sound velocity．This work not only provides a

more realistic theoretical framework for the standing wave method of sound velocity measurement but also offers insights for optimizing experimental teaching designs．By helping students intuitively understand the physical mechanisms of sound wave reflection and superposition，this study contributes to advancing experimental

teaching practices and fostering a deeper comprehension of wave superposition principles．