高中物理上册第七章“乐音”这一节课涉及到的声学现象很多,概念很抽象,学生又缺乏感性认识,因而,能否做好演示实验以加强直观性教学就成为这堂课成败的关键。笔者在实际教学中将普及率较高的电子琴与教学示波器结合起来,充分发挥电子琴音调准确、操作简便、能 High school physics on the seventh chapter “music ” This lesson involves a lot of acoustic phenomena, the concept is abstract, the students lack the perceptual knowledge, therefore, whether to do a demonstration experiment to enhance the visual teaching to become the class The key to success or failure. The author in the actual teaching will be higher penetration rate of the keyboard and teaching oscilloscope, give full play to the keyboard tone accurate, easy to operate, can