标准摘要
[中文适用范围]： 本文件规定了记录最大起飞质量（MTOM）小于150公斤的无人航空系统的转子驱动飞行器周围多个位置处瞬时声压时间历史的方法。 [外文原描述]： This document specifies methods for recording the time history of instantaneous sound pressure in several positions around rotor powered unmanned aircraft systems (UAS) with a maximum take-off mass (MTOM) of less than 150 kg in accordance with ISO 21895 [ 9 ] . The UAS can be either electrically powered or fuel-powered. It is not applicable to the tilt-rotor or tilt-wing UAS. It does not account for the UAS noise certification or regulation This document can also be applied to measure the sound pressure from a UAS with either multiple rotors or a single rotor. This document specifies: a) recommendations and requirements for three different test facilities for the noise measurements of various categories of multirotor-powered UAS: — requirements and recommendations of UAS noise tests in anechoic chambers (Clause 7); — requirements and recommendations of UAS noise tests in anechoic wind tunnels (Clause 8); — requirements and recommendations of UAS noise tests in outdoor environments (Clause 9); b) requirements and recommendations for the configuration of noise measurement for multirotor-powered UAS in hover, vertical take-off and landing, and horizontal cruise; c) recommendations for the test configuration and procedures to minimize the influence of meteorological effects.
英文名称Noise measurements for UAS (unmanned aircraft systems)