σ = {σij} (i, j = x, y, z)	Stress tensor of solid	Pa
s = {s}	Stress tensor of liquid	Pa
λ, μ	Transverse Lamé constants	Pa
λ′, μ′	Longitudinal Lamé constants	Pa
C = λ + 2μ	A measure of the transverse stiffness	Pa
C′	A measure of the longitudinal stiffness	Pa
R	A measure of water amount in porous solid under a constant pressure	Pa
Q	Transverse coupling coefficient of the solid and fluid	Pa
Q′	Longitudinal coupling coefficient of the solid and fluid	Pa
ε	Strain of fluid	*
U = {Ux, Uy, Uz}	Fluid displacement vector	m
e = {eij} (i, j = x, y, z)	Strain tensor of solid	*
u = {ux, uy, uz}	Solid displacement vector	m
gS	Body force applied on solid	N/m3
gF	Body force applied on fluid	N/m3
πS-F	Force applied on solid due to solid-fluid interaction	N/m3
πF-S	Force applied on fluid due to solid-fluid interaction	N/m3
ρS	Solid mass per unit volume of aggregate	kg/m3
ρF	Fluid mass per unit volume of aggregate.	kg/m3
ρ = ρF + ρS	Total mass per unit volume of aggregate.	kg/m3
β	Permeability of the porous solid.	kg/s·m3
ω	Fundamental frequency,	Hz
k	Wavenumber	m-1
a, b	Amplitude of vibration in x, z direction.	m
L	Vocal fold length	m

* represent that symbol is dimensionless factor.