Open AccessINVESTIGATION OF SIGNAL THRESHOLDING EFFECTS ON THE ACCURACY OF SOUND SOURCE LOCALIZATION
Author(s) -
Saulius Sakavičius
Publication year - 2021
Publication title -
international journal of advanced research
Language(s) - English
Resource type - Journals
ISSN - 2320-5407
DOI - 10.21474/ijar01/13377
Subject(s) - thresholding , computer science , signal (programming language) , microphone , audio signal , direction of arrival , speech recognition , cross correlation , frame (networking) , acoustics , acoustic source localization , sound (geography) , artificial intelligence , mathematics , sound pressure , statistics , telecommunications , physics , speech coding , antenna (radio) , image (mathematics) , programming language
In this article theoretical analysis of the signal thresholding effects on the accuracy of cross-correlation based sound source direction of arrival estimation was presented. The aim of the investigation was to determine the theoretical limits and challenges of the accuracy of the localization of a speaker within an acoustic enclosure by cross-correlation of two microphone signals and to offer means to increase the accuracy of sound source direction of arrival estimation via selection of audio frames based on the time lag estimation realiability measure. For the investigation, audio material from an openly accessible database was used. Presented are the methods for obtaining various features of the microphone signal frames, signal amplitude to minimum error amplitude calculation and experimentation with threshold-based audio frame selection.