本标准是关于室外空气质量描述和测量的系列部分中的第三部分 环境声音。本标准描述了短期压力测量的推荐程序， 社区中一个或多个位置的室外环境声时间平均值 评估或规划兼容的土地用途和其他用途，如展示 遵守规定。这些测量的区别在于要求有一个 观察员出席。声音可以由一个或多个独立的分布式声源产生，例如 公路、工厂或机场。给出了校正测量水平的方法，以消除 背景音。

This standard is the third in a series of parts concerning description and measurement of outdoor environmental sound. The standard describes recommended procedures for measurement of short-term, time-average environmental sound outdoors at one or more locations in a community for environmental assessment or planning for compatible land uses and for other purposes such as demonstrating compliance with a regulation. These measurements are distinguished by the requirement to have an observer present. Sound may be produced by one or more separate, distributed sources of sound such as a highway, factory, or airport. Methods are given to correct the measured levels for the influence of background sound.