“音调可变的哨子”小实验是人教版八年级上册物理教材“声音的特性”一课中“动手动脑学物理”的内容。通过学生自主实验的反馈,笔者发现材料寻找存在困难,另外学生对这个实验兴趣不大。笔者从小时候玩的“柳哨”中得到启发,用饮料吸管代替柳条,取得了好的实验效果。一、实验准备喝饮料用的塑料吸管、剪刀。二、实验操作把吸管的一端用牙轻轻地咬平,用剪刀把咬平处的两个角剪掉,形成上下两片三角形的簧片,如图1所示。图1哨口制作过程示意图 “Variable whistle ” small experiment is the PEP eighth grade physics teaching material “sound characteristics ” class “manual brain science ” content. Through the feedback of students’ independent experiments, the author found that the materials are difficult to find, and the other students are not very interested in this experiment. The author from childhood to play “Willow whistle” inspired, with a straw to replace wicker, and achieved good experimental results. First, the experimental preparation of drinking plastic drink pipe, scissors. Second, the experimental operation One end of the pipette with teeth gently bite flat, with the scissors to bite the two corners of the cut off, forming two upper and lower triangular reed, as shown in Figure 1. Figure 1 whistle making process diagram