Blind 3D sound source direction using stereo microphones based on time-delay estimation and polar-pattern histogram

Tengtrairat, Naruephorn and Woo, Wai Lok (2018) Blind 3D sound source direction using stereo microphones based on time-delay estimation and polar-pattern histogram. In: INCIT 2017 - 2nd International Conference on Information Technology, 2nd - 3rd November 2017, Nakhonpathom, Thailand.

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Abstract

In this research, a new 3 dimension sound source direction algorithm was developed for computing the azimuth and elevation direction of the source under a limited space between two microphones in noise free environment. The proposed azimuth-estimation method is based on the time - delay estimation using maximum likelihood estimation by forming a histogram of power weighted spectrum corresponding to attenuation and time-delay index. For estimating elevation angle, the proposed method requires a sole recorded signal which selected the higher sound pressure level between the two recorded signals. The elevation-angle estimation is computed by phase delay of the windowed autocorrelated signal. The windowed autocorrelation process of the selected signal benefits for reducing the influence of the artifacts. A polar-pattern histogram is employed for identify the source position associated to the microphone i.e. above or below. The proposed method has been demonstrated by real-audio signals. Given by a narrow space, the proposed azimuth-estimation method renders a significant better directional performance improvement over the benchmarked method.

Item Type:	Conference or Workshop Item (Paper)
Uncontrolled Keywords:	sound source direction; azimuth-elevation estimation; polar-pattern histogram; time-delay estimation; maximum likelihood
Subjects:	G400 Computer Science
Department:	Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User:	Paul Burns
Date Deposited:	25 Mar 2019 17:39
Last Modified:	10 Oct 2019 21:02
URI:	http://nrl.northumbria.ac.uk/id/eprint/38537

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