简述声音的基本类型
按照声波性质和组合方式的不同,声音可分为: (1)乐音系统:物体有规律地震动即产生乐音,一般指比较悦耳的声音; (2)噪音系统:物体无规律地震动便产生噪音,一般指不和谐、不悦耳的声音。
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