Show simple item record

dc.contributor.authorKim, Den_US
dc.contributor.authorAVITAL, Een_US
dc.contributor.authorMiloh, Ten_US
dc.contributor.editorKhelif, Aen_US
dc.date.issued2014-09-25en_US
dc.identifier.issn1687-6261en_US
dc.identifier.other392138
dc.identifier.other392138
dc.identifier.other392138
dc.identifier.other392138en_US
dc.identifier.other392138en_US
dc.identifier.urihttp://qmro.qmul.ac.uk/xmlui/handle/123456789/6799
dc.descriptionCopyright © 2014 Delyia Kim et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.description.abstractSound scattering by a Janus sphere type is considered. The sphere has two surface zones: a soft surface of zero acoustic impedance and a hard surface of infinite acoustic impedance. The zones are arranged such that axisymmetry of the sound field is preserved. The equivalent source method is used to compute the sound field. It is shown that, by varying the sizes of the soft and hard zones on the sphere, a significant reduction can be achieved in the scattered acoustic power and upstream directivity when the sphere is near a free surface and its soft zone faces the incoming wave and vice versa for a hard ground. In both cases the size of the sphere’s hard zone is much larger than that of its soft zone. The boundary location between the two zones coincides with the location of a zero pressure line of the incoming standing sound wave, thus masking the sphere within the sound field reflected by the free surface or the hard ground. The reduction in the scattered acoustic power diminishes when the sphere is placed in free space. Variations of the scattered acoustic power and directivity with the sound frequency are also given and discusseden_US
dc.format.extent392138-1 - 392138-11 (11)en_US
dc.languageEnglishen_US
dc.publisherHindawien_US
dc.relation.ispartofAdvances in Acoustics and Vibrationen_US
dc.subjectLinear acousticsen_US
dc.subjectSound scatteringen_US
dc.subjectJanus sphereen_US
dc.subjectInterface surfaceen_US
dc.titleSound Scattering and Its Reduction by a Janus Sphere Typeen_US
dc.typeArticle
dc.identifier.doi10.1155/2014/392138en_US
pubs.notesNo embargoen_US
pubs.publication-statusPublisheden_US
pubs.publisher-urlhttp://www.hindawi.com/journals/aav/2014/392138/en_US
pubs.volume2014en_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record