"Signal Processing of Acoustic Arrays"

Prof. E. L. Hixson
UT Austin

Friday, April 16th, 2:00 PM, ENS 302

ehixson@mail.utexas.edu

Abstract

The purpose and characteristics of arrays of acoustic sensors will be discussed. With usual processing methods spectral distortion is produced in broadband signals in off axis directions. This distortion results from the physical fact that beamwidth decreases as frequency increases. A method has been developed that uses filtered sums of superposed arrays to maintain constant beamwidth over a specified band of frequencies. Thus there is no spectral distortion in applications such as teleconferencing and loudspeaker insonofication of audiences. Several array configurations will be discussed.

Biography

Prof. Hixson has taught for many years in the UT ECE Department. These include most of the courses in the Undergraduate Curriculum but mostly in the area of electronic circuits and design lab. Graduate courses include basic acoustics, transducers and noise control. His research has been in acoustics in general and electroacoustics in particular.

A list of Signal and Image Processing Seminars is available at from the ECE department Web pages under "Seminars". The Web address for the Signal and Image Processing Seminars is http://anchovy.ece.utexas.edu/seminars