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Proceedings Paper

Identification of acoustic properties of auxetic foams
Author(s): Fabrizio L. Scarpa; F. Dallocchio; M. Ruzzene
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Paper Abstract

This paper presents an experimental investigation on the acoustic properties of a novel concept of auxetic (Negative Poisson's ratio) open cell polyurethane gray foam for dynamic crash loading applications. The acoustic absorption coefficients and real and imaginary part of the specific acoustic impedance have been measured with an ASTM standard impedance tube using a transmissibility technique. The foam shows a significant increase of the absorption properties in the low frequency range compared to equivalent conventional open cell foams. The acoustic properties of the foams are identified using an empirical model to describe their structural characteristic.

Paper Details

Date Published: 31 July 2003
PDF: 7 pages
Proc. SPIE 5052, Smart Structures and Materials 2003: Damping and Isolation, (31 July 2003); doi: 10.1117/12.487559
Show Author Affiliations
Fabrizio L. Scarpa, Univ. of Sheffield (United Kingdom)
F. Dallocchio, Univ. of Sheffield (United Kingdom)
M. Ruzzene, Georgia Institute of Technology (United States)

Published in SPIE Proceedings Vol. 5052:
Smart Structures and Materials 2003: Damping and Isolation
Gregory S. Agnes; Kon-Well Wang, Editor(s)

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