From a profiled diffuser to an optimized absorber

Wu, T; Cox, TJ; Lam, YW

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.

Citation

Wu, T., Cox, T., & Lam, Y. (2000). From a profiled diffuser to an optimized absorber. ˜The œJournal of the Acoustical Society of America (Online), 108(2), 643-650. https://doi.org/10.1121/1.429596

• Journal Article Type: Article
• Publication Date: Jan 1, 2000
• Deposit Date: Apr 19, 2011
• Publicly Available Date: Apr 5, 2016
• Journal: The Journal of the Acoustical Society of America (JASA)
• Print ISSN: 0001-4966
• Peer Reviewed: Peer Reviewed
• Volume: 108
• Issue: 2
• Pages: 643-650
• DOI: https://doi.org/10.1121/1.429596
• Publisher URL: http://dx.doi.org/10.1121/1.429596
• Related Public URLs: http://asadl.org/jasa/resource/1/jasman/v108/i2/p643_s1