ISO 20906:2009规定:a)机场周围永久安装的声音监测系统的典型应用；b)仪器的性能规格，及其无人值守安装和操作的要求，以便确定在选定地点连续监测的飞机声音声压级；c)监测机场飞机运行声音的要求；d)对描述飞机运行声音所需确定的量的要求；e)对报告数据的要求和报告的公布频率；f)根据ISO/IEC指南98-3确定报告数据的扩展不确定度的程序。 ISO 20906:2009没有提供:1)用于确认或验证预测的声音轮廓的方法；2)用于确定、验证或确认飞行器噪声认证数据的方法；3)一种描述飞机在地面上（包括地面运动和辅助动力装置的使用）时产生的声音的方法，除了在跑道上开始滚转起飞后以及在着陆和离开跑道到达之间。

ISO 20906:2009 specifies: a) the typical application for a permanently installed sound-monitoring system around an airport; b) performance specifications for instruments, and requirements for their unattended installation and operation, so as to determine continuously monitored sound pressure levels of aircraft sound at selected locations; c) requirements for monitoring the sound of aircraft operations from an airport; d) requirements for the quantities to be determined to describe the sound of aircraft operations; e) requirements for data to be reported and frequency of publication of reports; f) a procedure for determining the expanded uncertainty of the reported data in accordance with ISO/IEC Guide 98-3.

ISO 20906:2009 does not provide: 1) a method for confirming or validating predicted sound contours; 2) a method for determining, validating or confirming aircraft noise certification data; 3) a method for describing the sound generated by aircraft while on the ground (including ground movements and the use of auxiliary power units), except while on the runway after start of roll for departures and between touchdown and leaving the runway for arrivals.