Termites´ Emissions Enhancement Using Multilevel Wavelet Decomposition Structure

Author

de la Rosa, Juan José Gonzalez ; Puntonet, Carlos G.

Author_Institution

Cadiz Univ., Algeciras

fYear

2007

fDate

9-12 Sept. 2007

Firstpage

586

Lastpage

588

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/EURCON.2007.4400416

Filename

4400416