A superfluid waveguide partially packed with superleak. Probing the acoustic properties of porous media

1984 ◽  
Vol 55 (5-6) ◽  
pp. 455-467 ◽  
Author(s):  
David Linton Johnson ◽  
I. Rudnick
Keyword(s):  
Porous Media ◽  
Acoustic Properties

Acoustic properties of porous media

1983 ◽  
Vol 74 (S1) ◽  
pp. S57-S57
Author(s):  
David Linton Johnson ◽  
Thomas J. Plona
Keyword(s):  
Porous Media ◽  
Acoustic Properties

scholarly journals Acoustic impedance measurement of snow density

1998 ◽  
Vol 26 ◽  
pp. 92-96 ◽  
Author(s):  
O. Marco ◽  
O. Buser ◽  
P. Villemain ◽  
F. Touvier ◽  
Ph. Revol
Keyword(s):  
Porous Media ◽  
Acoustic Wave ◽  
Gamma Rays ◽  
Electromagnetic Waves ◽  
Characteristic Impedance ◽  
Impedance Measurement ◽  
Acoustic Properties ◽  
Laboratory Measurements ◽  
Snow Density ◽  
Acoustic Parameters

Today, it is possible to estimate the density of snow in many different ways (gravimetry, attenuation of gamma rays and velocity of electromagnetic waves). In this paper, we suggest using the acoustic properties of snow. First, we recall the main studies on the acoustic properties of snow. Then, we show, from laboratory measurements, the correlation between density and the acoustic parameters of snow. We found a very good correlation between density and the modulus of the normalized characteristic impedance. We also show that use ofa three-parameter model simulating the propagation of an acoustic wave in porous media allows one to calculate the density of snow from its acoustic porosity.

scholarly journals Acoustic impedance measurement of snow density

1998 ◽  
Vol 26 ◽  
pp. 92-96 ◽  
Author(s):  
O. Marco ◽  
O. Buser ◽  
P. Villemain ◽  
F. Touvier ◽  
Ph. Revol
Keyword(s):  
Porous Media ◽  
Acoustic Wave ◽  
Gamma Rays ◽  
Electromagnetic Waves ◽  
Characteristic Impedance ◽  
Impedance Measurement ◽  
Acoustic Properties ◽  
Laboratory Measurements ◽  
Snow Density ◽  
Acoustic Parameters

Today, it is possible to estimate the density of snow in many different ways (gravimetry, attenuation of gamma rays and velocity of electromagnetic waves). In this paper, we suggest using the acoustic properties of snow. First, we recall the main studies on the acoustic properties of snow. Then, we show, from laboratory measurements, the correlation between density and the acoustic parameters of snow. We found a very good correlation between density and the modulus of the normalized characteristic impedance. We also show that use ofa three-parameter model simulating the propagation of an acoustic wave in porous media allows one to calculate the density of snow from its acoustic porosity.

scholarly journals Microbial-induced heterogeneity in the acoustic properties of porous media

2009 ◽  
Vol 36 (21) ◽  
Author(s):  
Caroline A. Davis ◽  
Laura J. Pyrak-Nolte ◽  
Estella A. Atekwana ◽  
D. Dale Werkema ◽  
Marisa E. Haugen
Keyword(s):  
Porous Media ◽  
Acoustic Properties

Acoustic Properties of Artifical Larnyx Speech

1988 ◽  
Vol 16 ◽  
pp. 31-39
Author(s):  
Bethann Moffet ◽  
Rebekah Pindzola
Keyword(s):  
Acoustic Properties
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