On measurement of mechanical properties of sound absorbing materials
Abstract
This paper is an overview of quasistatic measurement technique used to determine mechanical properties of sound absorbing materials. Experimental context and behaviour of polymer foam and rock wool are summarized. Concerning parameters are: static and dynamic strains, dynamic effects such as skeleton resonance and coupling with saturating fluid. Material anisotropy and frequency dependance of characteristics are also addressed. It is shown that this technique is well suited for usual material up to 100 Hz. Restrictions occurs for thin samples of very high air flow resistivity and for fibrous material that do not exhibit a linear behaviour with static strain.
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