DC Field | Value | Language |
---|---|---|
dc.contributor.author | Ju, Hyeong Sick | ko |
dc.contributor.author | Kim, Yang-Hann | ko |
dc.date.accessioned | 2013-03-11T20:38:14Z | - |
dc.date.available | 2013-03-11T20:38:14Z | - |
dc.date.created | 2012-02-06 | - |
dc.date.created | 2012-02-06 | - |
dc.date.issued | 2010-09 | - |
dc.identifier.citation | APPLIED ACOUSTICS, v.71, no.9, pp.793 - 800 | - |
dc.identifier.issn | 0003-682X | - |
dc.identifier.uri | http://hdl.handle.net/10203/100215 | - |
dc.description.abstract | A parametric speaker is a device for generating and focusing highly directional sound beams. It is essentially a by-product that comes with the nonlinearity of ultrasound. It is noteworthy that this directional beam was controlled and utilized mostly for far-field applications in the past. We empirically study the directivity and attenuation characteristics of the parametric loudspeaker in the near-field where we desire to use it. Physical parameters for experiments are imported from a theoretical model based on the far-field approximation. The findings are that increases in aperture size and modulation frequency cause higher directivity, but have more than twice the beamwidth of the far-field approximation. The attenuation also does not obey the inverse-square law which describes far-field spreading from acoustic sources. The results conclusively explain a series of formation and attenuation of the virtual sound sources and define limitations of use in the near-field. (C) 2010 Elsevier Ltd. All rights reserved. | - |
dc.language | English | - |
dc.publisher | ELSEVIER SCI LTD | - |
dc.subject | RADIATION | - |
dc.subject | DESIGN | - |
dc.subject | ARRAY | - |
dc.title | Near-field characteristics of the parametric loudspeaker using ultrasonic transducers | - |
dc.type | Article | - |
dc.identifier.wosid | 000280534600002 | - |
dc.identifier.scopusid | 2-s2.0-77954176103 | - |
dc.type.rims | ART | - |
dc.citation.volume | 71 | - |
dc.citation.issue | 9 | - |
dc.citation.beginningpage | 793 | - |
dc.citation.endingpage | 800 | - |
dc.citation.publicationname | APPLIED ACOUSTICS | - |
dc.identifier.doi | 10.1016/j.apacoust.2010.04.004 | - |
dc.contributor.localauthor | Kim, Yang-Hann | - |
dc.contributor.nonIdAuthor | Ju, Hyeong Sick | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | Parametric loudspeaker | - |
dc.subject.keywordAuthor | Near-field | - |
dc.subject.keywordAuthor | Directivity | - |
dc.subject.keywordAuthor | Attenuation | - |
dc.subject.keywordAuthor | Spurious signal | - |
dc.subject.keywordPlus | RADIATION | - |
dc.subject.keywordPlus | DESIGN | - |
dc.subject.keywordPlus | ARRAY | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.