Title :
Compression and decompression of ultrasonic echoes by means of parametric wave phase conjugation
Author :
Preobrazhensky, V. ; Pernod, Philippe
Abstract :
The properties of magnetoacoustic Parametric Wave Phase Conjugation (WPC) in presence of multiscatterers and conditions of double pulse pumping are studied for the first time. The analyse of the temporal behaviour of the time reversed echoes from complex scatterers in several iterations of WPC process shows that specific phenomena of compression and decompression of ultrasonic scattered signals can arise. The results are of interest for non destructive testing applications
Keywords :
acoustic signal processing; echo; magnetoacoustic effects; nonlinear acoustics; ultrasonic materials testing; ultrasonic scattering; compression; decompression; double pulse pumping; magnetoacoustic parametric wave phase conjugation; multiscatterer; nondestructive testing; ultrasonic echo; ultrasonic scattering; Acoustic pulses; Acoustic reflection; Acoustic scattering; Acoustic testing; Acoustic transducers; Electromagnetic scattering; Magnetic properties; Optical wavelength conversion; Visualization; Wires;
Conference_Titel :
Ultrasonics Symposium, 1998. Proceedings., 1998 IEEE
Conference_Location :
Sendai
Print_ISBN :
0-7803-4095-7
DOI :
10.1109/ULTSYM.1998.762286
