Title :
Shear waves in plant leaves at ultrasonic frequencies: Shear properties of vegetal tissues
Author :
Farias, M.D. ; Alvarez-Arenas, T.E.G. ; Sancho-Knapik, Domingo ; Peguero-Pina, Jose Javier ; Gil-Pelegrin, Eustaquio
Author_Institution :
UMEDIA Res. group, Spanish Sci. Res. Council, Madrid, Spain
Abstract :
Shear Waves are observed in leaves of some plant species (Epipremnum aureum and Vitis vinifera) using air-coupled ultrasound, through transmission and oblique incidence. Shear waves appear as a modification of the thickness resonance pattern of the longitudinal wave measured at normal incidence. Poisson´s ratio, shear wave velocity and attenuation coefficient of shear waves in the leaves are extracted from the measured resonance spectra using a bilayer acoustic model for the leaves. Influence of water content or the degree of leaf development on shear wave properties is also analyzed.
Keywords :
acoustic wave absorption; bioacoustics; biological tissues; biomechanics; botany; elastic waves; ultrasonic applications; water; Epipremnum aureum; H2O; Poisson ratio; Vitis vinifera; air-coupled ultrasound; bilayer acoustic model; longitudinal wave measurement; oblique incidence; plant leave; plant species; resonance pattern; resonance spectra measurement; shear wave attenuation coefficient; shear wave velocity coefficient; transmission incidence; ultrasonic frequency; vegetal tissue shear property; water content; Acoustics; Attenuation; Data mining; Data models; Resonant frequency; Ultrasonic imaging; Ultrasonic variables measurement; air-coupled ultrasound; organic tissues; plant leaves; shear waves;
Conference_Titel :
Ultrasonics Symposium (IUS), 2012 IEEE International
Conference_Location :
Dresden
Print_ISBN :
978-1-4673-4561-3
DOI :
10.1109/ULTSYM.2012.0378
