IEC 61265:2018规定了用于测量声音的仪器系统的电声性能要求，用于飞机噪声认证和飞机型号之间的其他比较，并提供了可以定期进行测试以验证性能在规定限值内继续符合要求的方法。 通常，用于此目的的声音测量系统包括从麦克风(包括其挡风玻璃和其他附件)延伸通过数据记录和处理设备到合适的输出的仪器的组合。不同的测量系统，无论其组成如何，都以不同的方式执行必要的功能，并根据模拟或数字原理进行操作。 IEC 61265:2018取消并取代了1995年发布的第一版。本版构成技术修订版。 与上一版相比，此版本包括以下重大技术变更: a)增加大型运输机以外的飞机测量指南； b)增加用于接地平面测量系统的麦克风； c)对于某些飞机类型，增加除三分之一倍频程频带测量之外的加权声级测量； d)修订和澄清数字录音的要求； e)增加了测量不确定度评定的要求。

IEC 61265:2018 specifies requirements for the electroacoustical performance of systems of instruments used to measure sound for the purposes of aircraft noise certification, and for other comparisons among aircraft models, and provides methods by which tests can be made periodically to verify that the performance continues to conform to the requirements within stated limits.
In general, a sound measurement system for this purpose comprises a combination of instruments extending from a microphone, including its windscreen and other accessories, through data recording and processing devices to a suitable output. Different measurement systems, regardless of their composition, perform the necessary functions in different ways and operate on either analogue or digital principles.
IEC 61265:2018 cancels and replaces the first edition published in 1995. This edition constitutes a technical revision.
This edition includes the following significant technical changes with respect to the previous edition:
a) addition of guidance for measurements for aircraft other than large transport aeroplanes;
b) addition of microphones used in ground plane measurement systems;
c) addition of weighted sound level measurements other than one-third-octave band measurements, for certain aircraft types;
d) revision and clarification of requirements for digital audio recording;
e) addition of requirements for evaluation of measurement uncertainty.