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Enhancing the Acoustic Absorption Properties of Needlepunch Nonwovens

[+] Author Affiliations
Eliza L. Montgomery

Tex Tech Industries, Inc., North Monmouth, ME

Paper No. IMECE2003-55150, pp. 33-38; 6 pages
doi:10.1115/IMECE2003-55150
From:
  • ASME 2003 International Mechanical Engineering Congress and Exposition
  • Textile Engineering
  • Washington, DC, USA, November 15–21, 2003
  • Conference Sponsors: Textile Engineering Division
  • ISBN: 0-7918-3729-7 | eISBN: 0-7918-4663-6, 0-7918-4664-4, 0-7918-4665-2
  • Copyright © 2003 by ASME

abstract

This study encompasses the initial development of new acoustic absorbing materials for use in aircraft interiors. Current needlepunch nonwoven materials used as acoustic absorbers were characterized using three methods, the measurement of acoustic absorption coefficient, poroelastic parameters, and process factors. In order to show true improvement in the sound quality of an aircraft, two factors are considered: weight loss and noise reduction. An ideal material solution would include reducing the weight while also reducing the noise level. Although the attempt is to do both, a realistic goal for a new material is to reduce weight while maintaining current acoustic absorption values. This research is the initial characterization and development work for the formation of a new acoustic sound package for use in aircraft interiors.

Copyright © 2003 by ASME

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