ACOUSTIC-IMPEDANCE AND ABSORPTION-COEFFICIENT MEASUREMENTS OF POROUS MATERIALS USED IN THE AUTOMOTIVE INDUSTRY

Authors
SOTO PF HERRAEZ M GONZALEZ A DESAJA JA
Citation
Pf. Soto et al., ACOUSTIC-IMPEDANCE AND ABSORPTION-COEFFICIENT MEASUREMENTS OF POROUS MATERIALS USED IN THE AUTOMOTIVE INDUSTRY, Polymer testing, 13(1), 1994, pp. 77-88
Citations number
11
Categorie Soggetti
Polymer Sciences","Materials Science, Characterization & Testing
Journal title
Polymer testing → ACNP
ISSN journal
01429418
Volume
13
Issue
1
Year of publication
1994
Pages
77 - 88
Database
ISI
SICI code
0142-9418(1994)13:1<77:AAAMOP>2.0.ZU;2-#
Abstract
A comparative study of the acoustic impedance (Z(0)), the absorption c oefficient (a) and the reflection coefficient (R) of sever al thermopl astic porous compounds is presented. Seven closed cell crosslinked pol yolefin foams and a carpet of polypropylene staple fibres were analyse d. Measurements of the commonly used polyurethane foams were also reco rded to compare them with the results obtained with the above recyclea ble materials. The behaviour of the sound absorption in terms of the m ean pore size and the type of cell (closed or open) is considered for the analysed samples.