Noise measurements for UAS (unmanned aircraft systems)
Noise measurements for UAS (unmanned aircraft systems)
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1 Scope 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);
Mentioned in the description and other BS standards
