Speaker
Description
The increasing use of small unmanned aerial vehicles (UAVs) requires measurement methodologies capable of describing their acoustic emissions under realistic operating conditions. Traditional drone noise characterization mainly relies on anechoic chamber or ground-based measurements. However, while the first offers an accurate measurement of the drones’ noise emission and their directivity in stable air, the second allows performing measurements during real flying conditions but under the influence of the existing background noise in the recording situ.This study presents a comparison of noise emissions of drones during stationary flight by means of an on-board single-microphone measurement approach. An experimental campaign was conducted in the campus of the Universidad Católica San Antonio de Murcia on three different drones: Mavic 3 Classic, Matrice 4T and DJI Mavic 3M, with the latter drone being under two different setups with two propeller types. Measurements were performed with the microphone positioned onboard the hovering drone at three different heights above ground under monitored atmospheric conditions to investigate potential influences of ground reflections and air stability. Results compare the overall noise emission of the drones while highlighting the variability of the acoustics and psychoacoustics metrics.