规定了用于飞机噪声认证测量声音的仪器系统的电声性能要求，并推荐了可定期进行测试的方法，以验证性能是否继续符合规定公差内给出的要求。这些要求适用于用于测量最大认证起飞质量超过9000 kg的喷气式或螺旋桨驱动运输类飞机或其推进系统（安装在合适的室外发动机试验台上）产生的声音的仪器。 本出版物取代IEC 60561。 本副本包含1995年6月勘误表的内容。

Specifies requirements for the electroacoustical performance of systems of instruments used to measure sound for the purposes of aeroplane noise certification, and recommends methods by which tests may be made periodically to verify that the performance continues to comply with the requirements given within stated tolerances. The requirements apply to the instruments used to measure the sound produced by jet-or propeller-driven transport-category aeroplanes of maximum certificated takeoff mass over 9 000 kg, or their propulsion systems when installed on a suitable outdoor engine test stand. This publication supersedes IEC 60561. The contents of the corrigendum of June 1995 have been included in this copy.