Acoustic characteristics of fresh tea leaves

Mikio Fukuhara; Limi Okushima; Kiyoshi Matsuo; Tomoo Homma

doi:10.6090/jarq.39.45

Acoustic characteristics of fresh tea leaves

Mikio Fukuhara, Limi Okushima, Kiyoshi Matsuo, Tomoo Homma

New Industry Creation Hatchery Center (NICHe)

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	45-49
Number of pages	5
Journal	Japan Agricultural Research Quarterly
Volume	39
Issue number	1
DOIs	https://doi.org/10.6090/jarq.39.45
Publication status	Published - 2005 Jan

Keywords

Natural quasi-polymers
Ultrasonic transmission analysis
Viscoelasticity

ASJC Scopus subject areas

Biotechnology
Ecology
Animal Science and Zoology
Agronomy and Crop Science

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AU - Okushima, Limi

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AU - Homma, Tomoo

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N2 - 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.

AB - 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.

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KW - Ultrasonic transmission analysis

KW - Viscoelasticity

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Acoustic characteristics of fresh tea leaves

Abstract

Keywords

ASJC Scopus subject areas

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