Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers (1994)
Pacific Grove, CA, USA
Oct. 31, 1994 to Nov. 2, 1994
C. Lim , Adv. Linear Devices, Sunnyvale, CA, USA
R.O. Duda , Adv. Linear Devices, Sunnyvale, CA, USA
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.<
ear, maximum likelihood estimation, acoustic generators, band-pass filters, filtering theory, acoustic correlation, physiological models
C. Lim and R. Duda, "Estimating the azimuth and elevation of a sound source from the output of a cochlear model," Proceedings of 1994 28th Asilomar Conference on Signals, Systems and Computers(ACSSC), Pacific Grove, CA, USA, 1995, pp. 399-403.