Title :
Termites´ Emissions Enhancement Using Multilevel Wavelet Decomposition Structure
Author :
de la Rosa, Juan José Gonzalez ; Puntonet, Carlos G.
Author_Institution :
Cadiz Univ., Algeciras
Abstract :
The selective attenuation of the detail coefficients in the wavelet decomposition tree, allows the elimination of high-frequency additive noise, whose time-domain pattern does not fit the outline of the alarm impulses emitted by termites. Experimental results show that several wavelet families enhance the SNR almost in the same way. The ultrasound harmonics are benefited specially due to the absence of environmental noise in the ultrasound region.
Keywords :
AWGN; acoustic emission; acoustic signal processing; harmonics; noise (working environment); time-domain analysis; wavelet transforms; acoustic emission; alarm impulses; environmental noise; high-frequency additive noise; multilevel wavelet decomposition structure; selective attenuation; termites emissions enhancement; time-domain pattern; ultrasound harmonics; ultrasound region; Acoustic distortion; Additive noise; Frequency; Noise level; Noise reduction; Signal resolution; Signal to noise ratio; Ultrasonic imaging; Wavelet analysis; Wavelet coefficients; Termite detection; Time-frequency analysis; Wavelet analysis;
Conference_Titel :
EUROCON, 2007. The International Conference on "Computer as a Tool"
Conference_Location :
Warsaw
Print_ISBN :
978-1-4244-0813-9
Electronic_ISBN :
978-1-4244-0813-9
DOI :
10.1109/EURCON.2007.4400416
