4-噪声部分讲义

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1、环评工程师培训环境噪声讲义目录一、声学基础知识...................................................................................................21.什么是声音.................................................................................................22.描写声音的两个最重要的参量...........

2、.......................................................2（1）声压、声压级（描述声音的大小）.............................................2（2）频率（描述音调的高低）............................................................23.倍频程......................................................

3、..................................................24．声压级的叠加............................................................................................3（1）两个声压级的叠加.......................................................................3（2）n个声压级的叠加........

4、................................................................3二、必须掌握的基本概念、术语和定义................................................................31.A声级（见关于噪声的4个标准）............................................................32.等效连续A声级（见关于噪声的4个标准）........

5、..................................43.声源..............................................................................................................5（1）点声源（见导则3.4）..................................................................5（2）线声源（见导则3.5节）........

6、.....................................................5（3）面声源（见导则3.6节）.............................................................54.声源源强表达量（见导则4.3.2节）........................................................6（1）声功率级.......................................

7、................................................6（2）离声源一定距离处的声压级........................................................65.噪声评价量.................................................................................................6（1）声环境质量评价量（见导则4.3.1节）......

8、.................................6（2）厂界、场界、边界噪声评价量（见导则4.3.3）........................6三、噪声预测中常用的计算方法............................................................................61.户外声传播衰减计算的基本公式（见导则8.3.1，公式5）................