Blind 2D signal direction for limited-sensor space using maximum likelihood estimation

Tengtrairat, Naruephorn, Parathai, Phetcharat and Woo, Wai Lok (2017) Blind 2D signal direction for limited-sensor space using maximum likelihood estimation. Asia-Pacific Journal of Science and Technology, 22 (2). ISSN 2539-6293

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Humans can automatically turn toward the origin of the sound that they hear through their both ears. This capability is crucial in daily life. A computer that can recognize the direction of the sound source is also useful for many types of applications. A proposed blind 2-dimensional (2D) signal direction using two recording sensors is developed under a limited space between the sensors in noise free environment. The proposed 2D source direction 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. The histogram - boundary method is also proposed which relates to a distance of the two microphones. In addition, the fine-tuned number of time-index bins were investigated to figure out the proper number of bins for the histogram. Given by a narrow space i.e. 3.2 centimeters, the proposed method can acceptably direct the sound-source position. In experimental testing on real-audio sources, the proposed method has demonstrated a higher level of directional performance compared with an existing method.

Item Type: Article
Uncontrolled Keywords: Sound source direction, Blind stereo estimation, Time – delay estimation
Subjects: G400 Computer Science
Department: Faculties > Engineering and Environment > Computer and Information Sciences
Depositing User: Becky Skoyles
Date Deposited: 29 Mar 2019 11:32
Last Modified: 10 Oct 2019 20:49

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