利用智能手机测量不同传播介质中声速的实验装置设计  

Design of a Smartphone-Based Sound Velocity Measurement Device for Different Propagation Media

作　　者：任资卓 王宁[1] REN Zizhuo;WANG Ning(School of Electrical and Information Engineering,Zhengzhou University,Zhengzhou 450001,China)

机构地区：[1]郑州大学电气与信息工程学院,河南郑州450001

出　　处：《大学物理实验》2023年第2期100-106,共7页Physical Experiment of College

基　　金：郑州大学教育教学改革研究与实践项目(2021ZZUJGLX035)。

摘　　要：利用智能手机自制简易实验装置,搭建了一套驻波法声速测量系统,实现了声波在空气和不同液体介质中的传播速度的准确测量。实验使用手机FreqCounter APP产生单频声波信号,采用DaTuner APP软件检测实时频率和声音强度,通过测得相邻波腹或波节间的距离,根据其与频率和声速间的关系即可求出所测声速值。所取得实验结果与理论值具有良好的一致性。A simple sound velocity measurement device based on smartphone is designed to take accurate measurements of the sound velocity in different propagation media using the standing wave method.In the experiment,the FreqCounter APP on the smartphone is used to generate a single frequency acoustic signal.The DaTuner APP,on the other hand,is used to detect in real-time the frequency and intensity of the acoustic wave.By measuring the distance between adjacent antinodes or nodes,the sound velocity can be calculated according to the relationship among the frequency,the sound velocity,and the distance between adjacent antinodes.The sound velocity values obtained from the experiments are in good agreement with the theoretical values.

关 键 词：声速 驻波法 传播介质 智能手机 

分 类 号：O422.1[理学—声学]