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From a profiled diffuser to an optimized absorber

Wu, T, Cox, TJ and Lam, YW 2000, 'From a profiled diffuser to an optimized absorber' , The Journal of the Acoustical Society of America (JASA), 108 (2) , pp. 643-650.

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Abstract

The quadratic residue diffuser was originally designed for enhanced scattering. Subsequently, however, it has been found that these diffusers can also be designed to produce exceptional absorption. This paper looks into the absorption mechanism of the one-dimensional quadratic residue diffuser. A theory for enhanced absorption is presented. Corresponding experiments have also been done to verify the theory. The usefulness of a resistive layer at the well openings has been verified. A numerical optimization was performed to obtain a better depth sequence. The results clearly show that by arranging the depths of the wells properly in one period, the absorption is considerably better than that of a quadratic residue diffuser. © 2000 Acoustical Society of America.

Item Type: Article
Themes: Subjects / Themes > Q Science > QC Physics > QC221-246 Acoustics - Sound
Subjects outside of the University Themes
Schools: Colleges and Schools > College of Science & Technology
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering
Colleges and Schools > College of Science & Technology > School of Computing, Science and Engineering > Acoustics Research Centre
Journal or Publication Title: The Journal of the Acoustical Society of America (JASA)
Publisher: Acoustical Society of America
Refereed: Yes
ISSN: 0001-4966
Related URLs:
Depositing User: TJ Cox
Date Deposited: 19 Apr 2011 08:45
Last Modified: 20 Aug 2013 16:49
URI: http://usir.salford.ac.uk/id/eprint/14652

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