Title :
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
fDate :
31 Oct-2 Nov 1994
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;
Conference_Titel :
Signals, Systems and Computers, 1994. 1994 Conference Record of the Twenty-Eighth Asilomar Conference on
Conference_Location :
Pacific Grove, CA
Print_ISBN :
0-8186-6405-3
DOI :
10.1109/ACSSC.1994.471595
