Room Acoustic Source Localization With Distributed Microphone Arrays
Kim, Christopher
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https://hdl.handle.net/2142/117045
Description
Title
Room Acoustic Source Localization With Distributed Microphone Arrays
Author(s)
Kim, Christopher
Issue Date
2022-12-17
Keyword(s)
Relative Transfer Function; Distributed Microphones; Reverberation; SRP-PHAT
Abstract
Source localization involving multipath audio signals - namely when dealing with multiple audio sources or reverberant environments - is a challenging problem in acoustic signal processing. Simple time delay-of-arrival approaches for source localization operate under the presumption of an ideal scenario in which a single audio source dominantly propagates audio through the direct geometric path between the source and a microphone. However, this is not a scenario that can be assumed in many instances, and instead, this thesis focuses on the use of room acoustic transfer functions instead to account for the multipath nature of acoustically reverberant environments. Namely, a distributed set of microphone arrays is used to collect information to estimate the relative acoustic transfer functions (RTF’s) between each microphone and its reference microphone, and compare it against a pre-collected set of RTF’s, which each element corresponding to a discrete location in our environment, from which various matching pursuit algorithms can be used to
further solve for the localization of a constrained number of active sources.
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