Sound Absorption Behavior of Porous Al Produced by Spacer Method

Tetsumune Kuromura; Masataka Hakamada; Y. Chen; Hiromu Kusuda; Mamoru Mabuchi

doi:10.4028/www.scientific.net/AMR.15-17.422

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 15-17Sound Absorption Behavior of Porous Al Produced by...

Sound Absorption Behavior of Porous Al Produced by Spacer Method

Abstract:

Porous Al specimens with a pore size range from 212-300 to 610-700 μm, a porosity from 85 to 95% and a specimen thickness from 2 to 20 mm were produced by the spacer method, and their sound absorption capacity was investigated. For these specimens, sound absorption coefficient increased with increasing porosity. On the other hand, sound absorption coefficient varied inconsistently with the variation of pore sizes. The latter may be attributed to variation of aperture sizes of each specimen because the porous Al specimens with differerent pore sizes produced by the spacer method should have different aperture sizes. Sound absorption coefficient increased at the frequency below 2000 Hz with increasing specimen thickness.

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Periodical:

Advanced Materials Research (Volumes 15-17)

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422-427

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.15-17.422

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Online since:

February 2006

Authors:

Tetsumune Kuromura, Masataka Hakamada, Y. Chen, Hiromu Kusuda, Mamoru Mabuchi

Keywords:

Porous Al, Sound Absorption, Spacer Method

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