Acoustic Distortion Ratio Enhancement Using Multiple Pulse-Echo Method (MPEM) for Evaluation of B/A Nonlinear Parameter

• Published in: IEEE transactions on ultrasonics, ferroelectrics, and frequency control Vol. 67; no. 3; pp. 643 - 650
• Main Authors: Haumesser, Lionel, Vander Meulen, Francois
• Format: Journal Article
• Language: English
• Published: United States IEEE 01.03.2020; The Institute of Electrical and Electronics Engineers, Inc. (IEEE); Institute of Electrical and Electronics Engineers
• Subjects: Acoustic nonlinear parameter; Acoustics; Aluminum; Diffraction; Distortion; Distortion measurement; distortion ratio; Engineering Sciences; Evaluation; Fluids; Harmonic analysis; multiple pulse-echo method (MPEM); Parameters; Transducers
• ISSN: 0885-3010; 1525-8955
• DOI: 10.1109/TUFFC.2019.2947068

In this article, we report on the analysis of the extended acoustic signature obtained from the pulse-echo method to evaluate the B/A nonlinear parameter in fluids. In the known form of the method, the first acoustic tone burst from the reflector is used for the parameter measurement. The multiple pulse-echo method (MPEM) makes use of several tone bursts coming from the reflector back wall. The distortion ratio can be increased when the source frequency is tuned to a reflector resonance. The repercussion of this increase in the measurement of the nonlinear parameter B/A is investigated. As a practical result, this work suggests that the fluid volume required for the measurement can be reduced.