Determination of acoustic properties of thin polymer films utilizing the frequency dependence of the reflection coefficient of ultrasound

Hironori Tohmyoh, Yuhei Sakamoto

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

This paper reports on a technique to measure the acoustic properties of a thin polymer film utilizing the frequency dependence of the reflection coefficient of ultrasound reflected back from a system comprising a reflection plate, the film, and a material that covers the film. The frequency components of the echo reflected from the back of the plate, where the film is attached, take their minimum values at the resonant frequency, and from these frequency characteristics, the acoustic impedance, sound velocity, and the density of the film can be determined. We applied this technique to characterize an ion exchange membrane, which has high water absorbability, and successfully determined the acoustic properties of the membrane without getting it wet.

Original languageEnglish
Article number114901
JournalReview of Scientific Instruments
Volume86
Issue number11
DOIs
Publication statusPublished - 2015 Nov 1

ASJC Scopus subject areas

  • Instrumentation

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