Diffusive benefits of cylinders in front of a Schroeder diffuser | Zendy

Mark Pogson | Zendy; D. M. Whittaker | Zendy; G. A. Gehring | Zendy; Trevor J. Cox | Zendy; Richard J. Hughes | Zendy; Jamie A. S. Angus | Zendy

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Diffusive benefits of cylinders in front of a Schroeder diffuser

Author(s) -

Mark Pogson,

D. M. Whittaker,

G. A. Gehring,

Trevor J. Cox,

Richard J. Hughes,

Jamie A. S. Angus

Publication year - 2010

Publication title -

the journal of the acoustical society of america

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 0.619

H-Index - 187

eISSN - 1520-8524

pISSN - 0001-4966

DOI - 10.1121/1.3463817

Subject(s) - diffuser (optics) , cylinder , narrowband , front (military) , diffusion , mechanics , acoustics , optics , physics , geometry , materials science , mathematics , meteorology , thermodynamics , light source

A numerical investigation is performed into the diffusive effects of cylinders positioned in front of a Schroeder diffuser. A regular line of cylinders is shown to offer notable improvements to diffusion from a periodic Schroeder device, provided lateral cylinder spacing is incommensurable with the Schroeder period width. Further investigation considers angular dependence and low frequency results in greater detail, as well as the effects on narrowband and modulated Schroeder devices. An optimization procedure is subsequently performed to investigate the effects of an irregular cylinder arrangement, which provides further diffusive benefits.

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