Evaluation of the characteristic dimensions for porous sound-absorbing materials

Evaluation of the characteristic dimensions for porous sound-absorbing materials

The concept of characteristic thermal dimension was recently introduced to predict the behavior at high frequencies of the bulk modulus of fluids saturating a porous frame. This thermal dimension is closely related to the specific surface of the solid porous frame. It is shown that the standard Brun...

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Veröffentlicht in:Journal of applied physics 1995-01, Vol.77 (1), p.17-20
Hauptverfasser: Henry, Michel, Lemarinier, Pavel, Allard, Jean F., Bonardet, Jean L., Gedeon, Antoine
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container_issue 1
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container_title Journal of applied physics
container_volume 77
creator Henry, Michel
Lemarinier, Pavel
Allard, Jean F.
Bonardet, Jean L.
Gedeon, Antoine
description The concept of characteristic thermal dimension was recently introduced to predict the behavior at high frequencies of the bulk modulus of fluids saturating a porous frame. This thermal dimension is closely related to the specific surface of the solid porous frame. It is shown that the standard Brunauer, Emmett, and Teller method (BET) of measuring the specific surface and acoustical measurement of the bulk modulus are in good agreement, and that the viscous dimension can be evaluated unambiguously from the BET method plus an acoustical measurement.
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title Evaluation of the characteristic dimensions for porous sound-absorbing materials
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