Numéro
J. Phys. IV France
Volume 02, Numéro C1, Avril 1992
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics
Page(s) C1-759 - C1-762
DOI http://dx.doi.org/10.1051/jp4:19921165
Deuxième Congrès Français d'Acoustique / Second French Conference on Acoustics

J. Phys. IV France 02 (1992) C1-759-C1-762

DOI: 10.1051/jp4:19921165

CARACTÉRISATION ACOUSTIQUE ET MÉCANIQUE DES AÉROGELS DE SILICE

A.C. ARMAND and D. GUYOMAR

Direction des Services Acoustiques, THOMSON SINTRA ASM, BP. 138, F-06561 Valbonne, France


Abstract
An acoustical and mechanical study on SiO2 aerogels was investigated. In our paper we present the measurements of the bulk modulus for different pressures (from Patm to 100 bar) and of the transmitted and reflected coefficients of samples for frequencies lower than 15 kHz. These experiments confirm the relation between the Young modulus and the mass density, and show that the bulk modulus is linear with pressure.



© EDP Sciences 1992