声波在二维各向同性介质中的传播波场，包括波长快照和在地面接收到的波形图。-Acoustic waves in two-dimensional wave propagation in isotropic media field, including the wavelength and on the ground receives a snapshot of the waveform.

录音界面，有时频分析、语音播放、波形文件加载和存储功能。-Recording interface, and sometimes frequency analysis, voice playback, wave file to load and store functions.

通过正弦波和三角波的比较产生SPWM波形-Through the comparison of sine wave and triangle wave produces SPWM waveform