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在“声现象”一章的教学中,传统的方法是通过实验来研究乐音的三个特征,有的教材也采用用示波器来演示声波的波形。但是由于示波器的窗口较小,学生很难清楚地看到波形,而且广大的农村初级中学很少有配备示波器;其次要研究人耳的听觉频率范围还要用到音频发生器,设备较多,不能较好地显示频率的数值,实验达不到预期的效果.我们在教学中积极探寻好的教学手段,发现 Eshow 软件可以很好地用在声现象的教学中,实现声波信号的数字化、图示化
In the “Sound Phenomenon” chapter, the traditional method is to study the three characteristics of musical tones through experiments. Some textbooks also use oscilloscopes to demonstrate the waveform of sound waves. However, due to the small window of the oscilloscope, students can hardly see the waveform clearly, and the vast majority of junior middle schools in rural areas rarely have oscilloscopes; secondly, they need to use the audio generator to study the frequency range of the human ear and have more equipment. The frequency can’t be displayed well, and the experiment can’t reach the desired effect. We actively explored good teaching methods in teaching and found that Eshow software can be well used in the teaching of acoustic phenomena to realize digitalization of acoustic signals. Show