摘要
基于驻波形成原理,在智能手机上安装频谱软件作为频谱分析仪,测量声音在圆柱形管中共振时的固有频率,并计算出声速.通过两端开口的圆柱形管和一端开口的圆柱形管所测声速分别为341.19 m/s、339.25 m/s,相对误差分别为0.46%和1.1%.与昆明当地声速的理论值相当一致,并实现了声波共振的可视化.这一研究对于开发现代化的教具,促进教学质量和教学水平的提高具有重要意义.
Based on the principle of standing wave formation,spectrum software is installed on a smart phone as a spectrum analyzer to measure the natural frequency of sound in a cylindrical tube and calculate the sound speed.The measured sound velocities are 341.19 m/s and 339.25 m/s,which are in good agreement with the theoretical values of the local sound velocity in Kunming,and the visualization of acoustic resonance is realized.This research is of great significance for developing modern teaching aids,promoting teaching quality and improving teaching level.
作者
方由伟
刘应开
FANG Youwei;LIU Yingkai(School of Physics and Electronic Information,Yunnan Normal University,Kunming,Yunnan 650500)
出处
《物理通报》
CAS
2023年第9期99-103,107,共6页
Physics Bulletin
基金
教育部产学合作协同育人项目,项目编号:202002281001
高等学校教学研究项目,项目编号:DWJZW202142xn
教育部新工科项目,项目编号:E-SXWLHXLX20202605
云南省“万人计划”教学名师专项,项目编号:YNWR-JXMS-2019-020
云南师范大学本科线下一流建设课程《热学》,项目编号:2020xxkc51.
关键词
声速
智能手机
固有频率
smart phone
natural frequencies
sound speed
