Simulation of near-ground signals from a flying source on UAV over a building structure

• Main Authors: Hou, Jiacheng, Zheng, Zhongquan Charlie
• Format: Conference Proceeding
• Language: English
• ISSN: 1939-800X
• DOI: 10.1121/2.0001604

Acoustic signals near the ground generated by a moving source on a fly-by UAV are simulated around a house. The simulation is carried out using a time-domain acoustics solver that can simulate acoustic propagations with the specified moving source, ground properties, and building geometries. The source on a UAV is approximated by a broadband source moving at a constant speed. The long-range two-dimensional and three-dimensional computation is developed with an acoustically rigid ground and a residential house of realistic geometries. The different behaviors due to Doppler shift, ground effect, and acoustic interference from the house structures are analyzed from the acoustic pressure histories from the near-ground receivers at different locations around the house. Agreement is found with known literature for the Doppler effect and destructive interference behaviors for the free-space and flat ground cases. A novel behavior of destructive interference is found with the house.