TY - JOUR
T1 - Determination of acoustic properties of thin polymer films utilizing the frequency dependence of the reflection coefficient of ultrasound
AU - Tohmyoh, Hironori
AU - Sakamoto, Yuhei
N1 - Publisher Copyright:
© 2015 AIP Publishing LLC.
PY - 2015/11/1
Y1 - 2015/11/1
N2 - 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.
AB - 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.
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U2 - 10.1063/1.4935501
DO - 10.1063/1.4935501
M3 - Article
AN - SCOPUS:84947278389
SN - 0034-6748
VL - 86
JO - Review of Scientific Instruments
JF - Review of Scientific Instruments
IS - 11
M1 - 114901
ER -