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Feasibility Experiment on Position Estimation of Various Sound Sources

Authors:
Takeru Kadokura
Shigenori Ioroi
Hiroshi Tanaka

Keywords: Indoor Positioning; Sound Source; TDOA; Cross Correlation; CSP Analysis

Abstract:
This paper describes a method for estimating the position of various sound sources in an indoor environment and presents the results of basic positioning experiments. To date, we have performed position estimation based on the Time Difference Of Arrival (TDOA) method. In this investigation, the reception time difference at each reception point is compared to the theoretical value using a diffused sound, the human voice, the sound made by an operating microwave oven, and the ringing of a telephone. The reception time difference is necessary for position estimation. The reception time difference was obtained by cross correlation processing. Then, although the sound source position was obtained using this result, satisfactory positioning accuracy was not obtained except for the diffused sound source. Therefore, the whitening cross correlation method called Cross-power Spectrum Phase (CSP) analysis was applied. As a result, we could obtain a more accurate time difference than simple cross correlation for all sound sources, and we obtained a prospect that high accuracy positioning is possible.

Pages: 17 to 20

Copyright: Copyright (c) IARIA, 2018

Publication date: November 18, 2018

Published in: conference

ISSN: 2326-9324

ISBN: 978-1-61208-679-8

Location: Athens, Greece

Dates: from November 18, 2018 to November 22, 2018