一、知识脉络声现象一章由声的产生与传播、声音的特性、声的利用、噪声的危害和控制四部分组成,所包含的主要知识内容如图1所示。二、命题特点中考物理试题对声现象的考查,基本上都是注重对基础知识、基本技能的考查。从近几年全国各地市的中考物理试题来看,尽管试题的内容和形式各有不同,但单纯的考死记硬背的试题已不多见,且都具有 First, the sound phenomenon of a chapter by the sound generation and transmission, the sound characteristics, the use of sound, the harm and control of noise composed of four parts, the main contents of the knowledge contained in Figure 1. Second, the propositional characteristics of senior high school entrance examination on the sound phenomenon of physical examination, are basically focus on basic knowledge, basic skills test. In recent years, from all over the country in the examination of physical examination questions, although the content and form of the test questions are different, but a simple test of memorizing questions have been rare, and both have