Adjacent-channel inhibition in acoustic onset detection

Author

Shahwan, Tareq ; Duda, Richard O.

Author_Institution

Dept. of Electr. Eng., San Jose State Univ., CA, USA

Volume

2

fYear

1994

fDate

31 Oct-2 Nov 1994

Firstpage

923

Abstract

Simple acoustic onset detectors respond to sudden changes in energy levels. Unfortunately, they respond to frequency modulation as well as to amplitude modulation, and have high false-alarm rates in the presence of siren or chirp signals. The authors show how adjacent-channel inhibition can be used to greatly reduce the false-alarm rate. An LMS procedure is used to obtain optimal inhibitory weights. Computer simulations reveal how the response to chirps varies with the rate of change of instantaneous frequency

Keywords

acoustic signal processing; adjacent channel interference; amplitude modulation; chirp modulation; frequency modulation; interference suppression; least mean squares methods; LMS procedure; acoustic onset detection; adjacent-channel inhibition; amplitude modulation; chirp signals; energy levels; false-alarm rates; frequency modulation; instantaneous frequency; optimal inhibitory weights; siren or chirp signals; Acoustic signal detection; Chirp; Computer simulation; Detectors; Energy states; Filter bank; Frequency modulation; Image edge detection; Least squares approximation; Source separation;

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.1994.471595

Filename

471595