Browse Publications Technical Papers 2001-01-1557

Pilot Benchmarking Study of Polyether Foams for Acoustical Applications 2001-01-1557

This paper describes a pilot benchmarking study of polyether foams for acoustical applications. The study investigates the differences in sound absorption performance that result from two different foam manufacturing methods: thin sheet casting and bun manufacturing. A basic conjecture that is examined in this work is that thin sheet cast foams have the following advantages over bun stock manufacturing: higher sound absorption performance and lower variability of the physical properties that determine acoustical performance. It is shown that the sound absorption performance of thin sheet cast urethane foam is 40% and 67% higher than the best performance of bun stock foam when evaluated by the Average Normal Sound Absorption Coefficient (ANSAC) and the noise reduction coefficient (NRC) respectively. In general, the computed variabilities for the properties of thin sheet cast urethane foam are lower than those for the bun stock foams.
In addition, an analysis of variance (ANOVA), suggests that bun stock foam has properties that vary with statistical significance according to the location along the rise direction. This non-uniformity can be found on the noise reduction coefficient, average normal sound absorption coefficient, and density.


Subscribers can view annotate, and download all of SAE's content. Learn More »


Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.

Due to current capacity constraints, printed versions of our publications - including standards, technical papers, EDGE Reports, scholarly journal articles, books, and paint chips - may experience shipping delays of up to four to six weeks. We apologize for any inconvenience.
We also recommend:

Microcellular Ceramic Foams: Manufacturing and Study of Acoustical Properties


View Details


Noise Control for Heavy Duty Trucks, a Systems Approach


View Details


Noise Transmission Characteristics of Aircraft-Type Composite Panels


View Details