ISO/NP 25450

​​Sound Power Level and Sound Pressure Level Directivity Measurement of UAS​ ISO/NP 25450

Scope

This standard will specify the method for measuring the far-field sound pressure radiated from a UAS and the procedures for using those measurements to calculate the sound power level and the sound pressure level directivity for use in noise mapping.



The standard will also propose that the overall A-weighted sound power level is used to quantify the noise impact of a UAS.



Only the hover condition will be considered at this time. In the future, the standard should be extended to include straight and level flight, take-off, landing and other flight modes.