Title :
Application of wavelet transform signal processor to ultrasound
Author :
Abbate, A. ; Koay, J. ; Frankel, J. ; Schroeder, S.C. ; Das, P.
fDate :
Oct. 31 1994-Nov. 3 1994
Abstract :
The wavelet transform is applied to the analysis of ultrasonic waves for improved signal detection and analysis. In instances where the mother wavelet is well defined, the wavelet transform has relative insensitivity to noise and does not need windowing. Peak detection of ultrasonic pulses using the wavelet transform is described and results show good detection even when large white noise was added. The use of the wavelet transform to extract the frequency dispersion relation of the Lamb wave velocity is also described. The two-dimensional wavelet transform allows for both time and frequency analysis, thus making it particularly suitable for dispersion studies. Experimental and numerical results show the superior performance of the wavelet transform signal processor
Keywords :
acoustic pulses; acoustic signal detection; acoustic signal processing; surface acoustic wave signal processing; ultrasonic dispersion; ultrasonic velocity; ultrasonic waves; wavelet transforms; Lamb wave velocity; frequency analysis; frequency dispersion relation; noise insensitivity; noise suppression; numerical results; peak detection; signal analysis; signal detection; time analysis; two-dimensional wavelet transform; ultrasonic pulses; ultrasonic wave analysis; wavelet transform signal processor; white noise; Acoustic pulses; Acoustic signal analysis; Acoustic signal detection; Surface acoustic wave signal processing; Wavelet transforms;
Conference_Titel :
Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE
Conference_Location :
Cannes, France
Print_ISBN :
0-7803-2012-3
DOI :
10.1109/ULTSYM.1994.401791
