Estimating the azimuth and elevation of a sound source from the output of a cochlear model

Author

Lim, Chuck ; Duda, Richard O.

Author_Institution

Adv. Linear Devices, Sunnyvale, CA, USA

Volume

1

fYear

1994

fDate

31 Oct-2 Nov 1994

Firstpage

399

Abstract

Interaural intensity differences (IIDs) and interaural time differences (ITDs) give important information for estimating the elevation as well as the azimuth of a sound source. The authors extract this information from a filter-bank model of the cochlea using straightforward short-time autocorrelation and crosscorrelation operations. With the appropriate coordinate system, the resulting ITD varies primarily with azimuth, while the IID varies with azimuth and elevation. For a single sound source in an anechoic environment, a maximum-likelihood estimation procedure is shown capable of recovering azimuth to within 1 degree and elevation to within 16 degrees

Keywords

acoustic correlation; acoustic generators; band-pass filters; ear; filtering theory; maximum likelihood estimation; physiological models; anechoic environment; azimuth estimation; cochlear model; coordinate system; crosscorrelation; elevation estimation; filter-bank model; interaural intensity differences; interaural time differences; maximum-likelihood estimation; short-time autocorrelation; sound source; Acoustic diffraction; Azimuth; Data mining; Ear; Energy measurement; Fourier transforms; Frequency; Humans; Time measurement; Transfer functions;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems and Computers, 1994. 1994 Conference Record of the Twenty-Eighth Asilomar Conference on

Conference_Location

Pacific Grove, CA

ISSN

1058-6393

Print_ISBN

0-8186-6405-3

Type

conf

DOI

10.1109/ACSSC.1994.471484

Filename

471484