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Impact of Microphone Array Configurations on Robust Indirect 3D Acoustic Source Localization

Citation Author(s):
Keith Brown, Kartic Subr
Submitted by:
Elizabeth Vargas
Last updated:
13 April 2018 - 6:16pm
Document Type:
Presentation Slides
Document Year:
2018
Event:
Presenters:
Elizabeth Vargas
Paper Code:
2194
 

Acoustic source localization (ASL) is an important problem. Despite much attention over the past few decades, rapid and
robust ASL still remains elusive. A popular approach is to use a circular array of microphones to record the acoustic signal followed by some form of optimization to deduce the most likely location of the source. In this paper, we study the impact of the configuration of microphones on the accuracy of localization. We perform experiments using simulation as well as real measurements using a 72-microphone acoustic camera which confirm that circular configurations lead to higher localization error than spiral and wheel configurations when considering large regions of space. Moreover, the configuration of choice is intricately tied to the optimization scheme. We show that direct optimization of well known formulations for ASL yield errors similar to the state of the art (steered response power) with 6 times less computation.

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