Electronic Theses and Dissertations

Date

2025

Document Type

Thesis

Degree Name

Master of Science

Department

Electrical & Computer Engineering

Committee Chair

Eddie Jacobs

Committee Member

Aaron Robinson

Committee Member

Alf Ramirez

Abstract

The work presented in this thesis explores the key design parameters of microphone sensing systems for beamforming, specifically for a stationary uniform rectangular array (URA) and a drone mounted uniform line array (ULA). It explains the development of a custom audio recorder using a Field Programmable Gate Array (FPGA) with Hard Processor System (HPS), using a unique distribution of Linux called NixOS. It details experiments conducted to characterize these systems in controlled environments like a wind tunnel and an anechoic chamber, as well as in the field for real-world testing. It also investigates methods for the autonomous detection of sound sources of interest, including drones and ground vehicles such as tanks and large diesel trucks. The novel detection method monitors the mean and standard deviation of the principal components from an audio spectrogram in real-time. The results of this analysis are presented and discussed, demonstrating how acoustics can enhance various sensing modalities and improve environmental awareness.

Comments

Data is provided by the student.

Library Comment

PDF

Notes

Open access.

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