Acoustic Characteristics of Fresh Tea Leaves
Japan Agricultural Research Quarterly
ISSN | 00213551 |
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NII recode ID (NCID) | AA0068709X |
Full text
39-01-07.pdf313.85 KB
The acoustic characteristics of sound fresh tea leaves were determined nondestructively by ultrasonic transmission analysis. As thickness increases, phase velocity and wavelength increase, and damping ratio and dynamic viscosity decrease, suggesting development of the fibrous tissues, accompanied by frequency convergence. The velocities of all the leaves studied were smaller than that of pure water. Decrease in viscoelasticity corresponds to increase in dynamic modulus. Thus, acoustically, we can regard the leaves as natural quasi-polymers with high viscoelasticity.
Date of issued | |
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Creator | FUKUHARA Mikio OKUSHIMA Limi MATSUO Kiyoshi HOMMA Tomoo |
Subject |
ultrasonic transmission analysis viscoelasticity natural quasi-polymers |
Publisher | Japan International Research Center for Agricultural Sciences |
Available Online | |
NII resource type vocabulary | Journal Article |
Volume | 39 |
Issue | 1 |
spage | 45 |
epage | 49 |
DOI | 10.6090/jarq.39.45 |
Rights | Japan International Research Center for Agricultural Sciences |
Language | eng |