2.2声音的特性（课件）-【备课无忧】2023-2024学年八年级物理上册同步精品备课（人教版）

2.2声音的特性 Y 01 了解声音的... text has been truncated due to evaluation version limitation. 02 通过实验，... text has been truncated due to evaluation version limitation. 知道声音三... text has been truncated due to evaluation version limitation. 03 教学目标 一 课堂引入 二 你是否能感... text has been truncated due to evaluation version limitation. 为什么各种... text has been truncated due to evaluation version limitation. 想一想 音调 三 音调 1.定义：声音的高低叫做音调。 生活中，有... text has been truncated due to evaluation version limitation.音调高，有的听起... text has been truncated due to evaluation version limitation.音调低。 为什么会这... text has been truncated due to evaluation version limitation. 牛发出的声... text has been truncated due to evaluation version limitation.低沉， 蚊子发出的... text has been truncated due to evaluation version limitation.细高。 【实验1】探究音调和频率的关系 将一把钢尺... text has been truncated due to evaluation version limitation.，一端伸出桌... text has been truncated due to evaluation version limitation.。拨动钢尺，听它振动发... text has been truncated due to evaluation version limitation.，同时注意钢... text has been truncated due to evaluation version limitation.。多次改变钢尺伸... text has been truncated due to evaluation version limitation.，使钢尺振动... text has been truncated due to evaluation version limitation.，再次拨动钢尺。 振动部分长... text has been truncated due to evaluation version limitation. 3/4钢尺长 2/4钢尺长 1/4钢尺长 振动快慢 音调高低 比较几种情... text has been truncated due to evaluation version limitation. 音调 三 振动部分长... text has been truncated due to evaluation version limitation. 3/4钢尺长 2/4钢尺长 1/4钢尺长 振动快慢 音调高低 慢 低 快 高 更快 更高 实验记录 实验结论 钢尺振动得_____... text has been truncated due to evaluation version limitation.，发出声音... text has been truncated due to evaluation version limitation._____... text has been truncated due to evaluation version limitation.。振动得_____... text has been truncated due to evaluation version limitation.。音调_____... text has been truncated due to evaluation version limitation.。 越快 越高 越慢 越低 音调 三 【实验2】 将橡皮筋套... text has been trunca