Enhanced directivity with array gratings

A planewave, incident on a panel, produces an acoustic trace wavelength that propagates along the surface of the panel. The trace wavelength excites the panel into vibration, creating structural waves within the panel that propagate. These structural waves can be purposely Bragg scattered, creating...

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Bibliographic Details
Published in:	The Journal of the Acoustical Society of America Vol. 136; no. 2; pp. EL103 - EL108
Main Authors:	Cray, Benjamin A, Moss, Geoffrey R
Format:	Journal Article
Language:	English
Published:	United States 01-08-2014
Subjects:	Acoustics - instrumentation Computer Simulation Equipment Design Finite Element Analysis Fourier Analysis Models, Theoretical Motion Numerical Analysis, Computer-Assisted Pressure Sound Time Factors Transducers, Pressure Vibration
Online Access:	Get full text
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Description
Summary:	A planewave, incident on a panel, produces an acoustic trace wavelength that propagates along the surface of the panel. The trace wavelength excites the panel into vibration, creating structural waves within the panel that propagate. These structural waves can be purposely Bragg scattered, creating replicas of the trace wavenumber. The replicas are shifted in wavenumber precisely by the inverse of the periodic separation distance l. Hence, in principle, it should be possible to resolve the acoustic trace wavelength from one of the shifted replicas of the panel's response. The incident angle can then be ascertained from the replicated trace wavelengths.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0001-4966 1520-8524
DOI:	10.1121/1.4885479