Experimental Verification of Design Charts for Acoustic Absorbers

Paper #:
  • 971951

Published:
  • 1997-05-20
Citation:
Hastings, M. and Godfrey, R., "Experimental Verification of Design Charts for Acoustic Absorbers," SAE Technical Paper 971951, 1997, https://doi.org/10.4271/971951.
Pages:
4
Abstract:
Design charts which predict acoustic absorption of porous insulators were verified experimentally using the two-microphone technique to measure the normal incidence absorption coefficient of three glass fiber materials in two different arrangements - a single-layer sample and a single layer in front of an air space, each backed by a rigid termination. The specific flow resistivities of the materials ranged from 2,000 to 52,000 mks rayls/m. Experimentally determined absorption coefficients were in agreement with those predicted by the design charts. The results indicate that these charts could be a useful tool in designing sound absorbers for practical applications.
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