Sponsor:
NASA Langley Research Center

Collaborator:
Purdue University

Methods are developed to analyze and optimize sound in elastic-porous (e.g., foam), solid and fluid domains. Unlike approximate solution tools that have been used for the modeling of foam type materials, methods based on rigorous physical and mathematical principles are developed. The resulting development is used for the analysis of noise controls treatments in applications such as vehicle sound insulation, mufflers and ducts, headliners, seats, carpets, trim lining, and enclosure liners.