Estimation of resistivity from imag(dynamic mass density)

Estimation of resistivity from mass density

$\omega$|imag($\rho$)| (i.e. $\sigma$ at low freq.)
vs. frequency in Hz

1. Drag & drop .rok, .csv, .txt file
with $\rho$ measurements in graph area
or use this ($\sigma$ = 6100 ± 900)

2. Adjust frequency range for estimation
(by clicking on graph area)

3. Check with a simulation :
(click & drag numbers)
• porosity ($\phi$) : %,
• resistivity : N.s.m^-4,
• tortuosity : ,
• viscous charac. length : $\mu$m

A more general method allowing the Estimation of all 6 parameters of Johnson-Champoux-Allard-Lafarge model for acoustical porous materials from impedance tube measurements is described by L. Jaouen, E. Gourdon, Ph. Glé in a paper published in J. Acoust. Soc. Am. 148(4), pp. 1998-2005, 2020 :
https://doi.org/10.1121/10.0002162

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Luc Jaouen (@ljaouen), ISSN 2606-4138.
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