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On the Development of a Ground-Positioned Microphone Phased Array for Fly-Over Noise Measurements on Unmanned Aerial Vehicles

Smits, J.H.B. (2024) On the Development of a Ground-Positioned Microphone Phased Array for Fly-Over Noise Measurements on Unmanned Aerial Vehicles.

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Abstract:This thesis details the development of a ground-positioned microphone phased array designed to localize and quantify noise from unmanned aerial vehicle flyovers. The microphones used in the array are low-cost analogue MEMS microphones designed to withstand outdoor weather conditions. A custom printed circuit board and electronic circuit were developed to power the microphones and optimize their performance. The array was designed for flexible microphone positioning, enabling performance optimisation based on the specific sound source of interest. A measurement method and setup, known as acoustic GPS, was implemented to accurately and efficiently determine the positions of the microphones. Far-field acoustic beamforming algorithms were implemented in Python. Extensive measurements were conducted in an anechoic chamber to validate the far-field acoustic beamforming algorithms and verify the microphone calibration method. Additionally, the performance and robustness of the measurement system were evaluated during outdoor flyover tests with a quadcopter UAV. The capabilities of the ground-positioned microphone phased array system were successfully demonstrated, showcasing its potential as a valuable tool for noise analysis of UAVs, ultimately contributing to the mitigation of UAV noise pollution.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:33 physics, 43 environmental science, 50 technical science in general, 52 mechanical engineering
Programme:Mechanical Engineering MSc (60439)
Link to this item:https://purl.utwente.nl/essays/103611
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