第1页共75页编号：时间：2021年x月x日书山有路勤为径，学海无涯苦作舟页码：第1页共75页噪声控制工程讲义绪论........................................................................................................5第一篇.....................................................................噪声基础知识.....................................................................................................................5第一章概述.........................................................................................................................................51.1噪声及其危害.........................................................................................................................51.1.1噪声.............................................................................................................................51.2噪声的控制.............................................................................................................................61.2.1控制的原则.....................................................................................................................61.2.2控制的措施.....................................................................................................................6第二章：环境声学的基本概念.................................................................................................................72.1声波的产生及描述方法....................................................................................................72.1.1声波的产生.....................................................................................................................72.1.2描述的物理量.............................................................................................................72.2声波类型和声场类型.............................................................................................................72.2.1波动方程及其几个概念............................................................................................72.2.2声波类型.........................................................................................................................82.2.3声场的类型（各声场的特点）................................................................................9第三章声压级、声强级、声功率级及其计算....................................................................................93.1声能量、声强、声功率........................................................................................................93.2级的概念.................................................................................................................................103.2.1声压级、声强级和声功率级........................................................................................103.2.2声压级的相加.................................................................................................................113.2.3声波的相减.....................................................................................................................113.2.4声压级的平均.................................................................................................................11第四章噪声频谱特性和噪声传播过程中的一些现象........................................................................124.1噪声频谱特性.................................
