Fourier Spectrum Pulse-Echo for Acoustic Characterization

TL;DR

This paper introduces the Fourier Spectrum Pulse-Echo (FSPE) technique for more accurate ultrasonic attenuation and velocity measurements, demonstrating its effectiveness in ultrapure water at specific frequencies.

Contribution

The paper presents the FSPE method as a novel approach to improve ultrasonic property estimation by analyzing frequency components, addressing limitations of traditional pulse-echo methods.

Findings

FSPE provides more accurate attenuation measurements.

FSPE effectively determines ultrasonic velocity in water.

Method works at 1MHz and 2MHz frequencies.

Abstract

Ultrasonic wave attenuation({\alpha}) measurement by pulse-echo method exhibits pronounced dependence on experimental conditions. It is shown to be an inherent characteristic of the method itself. Estimation of {\alpha} from the component wave amplitudes in the frequency scale gives more accurate and consistent value. This technique, viz., the Fourier Spectrum Pulse-Echo (FSPE) is demonstrated to determine the ultrasonic velocity(v) and attenuation constant({\alpha}) in ultrapure de-ionized water at room temperature (250C) at 1MHz and 2 MHz wave frequency.