【摘要】 设计并制作了多模态声驻波演示仪，采用自动移动扫描装置采集圆形驻波管中的声场信号，利用Audition音频分析软件实时显示具有驻波形态的时域波形，通过蓝牙音箱实时监听驻波管内部的声音，并由Audition基于短时傅里叶变换的频谱图观察驻波场中的谐波.同时，还探究了驻波管长度、管径、边界条件、扫描速度及麦克风尺寸等对驻波场的形成和测量的影响.更多还原

【Abstract】 A multifunctional acoustic standing wave demonstration instrument was designed and built. The instrument could collect the acoustic field signal of the circular standing wave tube through automatic frequency scanning, and the time-domain standing wave would be shown by using the sound analysis software Audition. The standing wave field could be monitored in real-time by bluetooth speaker. Based on spectrum diagram gotten by short time Fourier transform, the harmonics were observed in the standing wave field by Audition software. The influence of the length and diameter of standing wave pipe, boundary conditions, scanning speed, microphone size on the formation and measurement of standing wave field was explored as well.更多还原