Experimental Verification of Design Charts for Acoustic Absorbers

Document Number: 971951

Date Published: May 1997

Author(s):
Mardi C Hastings - Ohio State Univ
Richard D Godfrey - Ohio State Univ

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.

File Size: 139K
Product Status: In Stock

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