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

Naruephorn Tengtrairat, Wai Lok Woo

Research output: Chapter in Book/Report/Conference proceedingChapterpeer-review

2 Citations (Scopus)

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.
Original languageEnglish
Title of host publicationProceedings of 2017 2nd International Conference on Information Technology, INCIT 2017
PublisherIEEE
Number of pages6
ISBN (Electronic)9781538614310
ISBN (Print)9781538614327
DOIs
Publication statusPublished - 12 Jan 2018

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