Application of wavelet transform signal processor to ultrasound

Author

Abbate, A. ; Koay, J. ; Frankel, J. ; Schroeder, S.C. ; Das, P.

Volume

2

fYear

1994

fDate

Oct. 31 1994-Nov. 3 1994

Firstpage

1147

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Ultrasonics Symposium, 1994. Proceedings., 1994 IEEE

Conference_Location

Cannes, France

Print_ISBN

0-7803-2012-3

Type

conf

DOI

10.1109/ULTSYM.1994.401791

Filename

401791