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Statements

Subject Item
dbr:Parametric_array
rdf:type
yago:System108435388 dbo:Organisation yago:WikicatNonlinearSystems yago:Group100031264 yago:Abstraction100002137 yago:NonlinearSystem108435246
rdfs:label
Parametric array
rdfs:comment
A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a kind of spatial 'uncertainty principle') associated with linear acoustics. The main side lobe-free beam of low frequency sound is created as a result of nonlinear mixing of two high frequency sound beams at their difference frequency. Parametric arrays can be formed in water, air, and earth materials/rock.
dcterms:subject
dbc:Acoustics dbc:Sound dbc:Nonlinear_systems
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8249556
dbo:wikiPageRevisionID
1105678069
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dbr:Sound_from_ultrasound dbr:Sonar dbr:Lord_Rayleigh dbr:Lemelson-MIT_Prize dbr:Brown_University dbr:Aeroacoustics dbc:Nonlinear_systems dbr:Transducer dbr:Green's_functions dbr:Side_lobe dbc:Sound dbr:Acoustics dbr:Sound_wave dbr:Peter_Westervelt dbr:Nonlinear_acoustics dbr:Acoustical_Society_of_America dbr:Diffraction_limit dbr:James_Lighthill dbc:Acoustics dbr:Fourier_operator dbr:Ultrasound dbr:Wavenumber
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dbp:reference
Robert T. Beyer, Nonlinear Acoustics, 1st Edition ,. Published by the Naval Sea Systems Command. Mark B. Moffett and Robert H. Mellen, "On Parametric Source Aperture Factors", J. Acoust. Soc. Am. Vol. 60, No. 3, Sept. 1976 V.M. Albers,"Underwater Sound, Benchmark Papers in Acoustics, p.415; Dowden, Hutchinson and Ross, Inc., Stroudsburg, PA H.C. Woodsum, Proc. 17th International Conference on Nonlinear Acoustics, AIP Press , 2006; " Comparison of Nonlinear Acoustic Experiments with a Formal Theory for the Scattering of Sound by Sound", paper TuAM201. 0001-05-18 Peter J. Westervelt, "Parametric Acoustic Array", Journal of the Acoustical Society of America, Vol. 35, No. 4 , 1963 Ronald A. Roy and Junru Wu, "An Experimental Investigation of the Interaction of Two Non-Collinear Beams of Sound", Proceedings of the 13th International Symposium on Nonlinear Acoustics, H. Hobaek, Editor, Elsevier Science Ltd., London J.S. Bellin and R. T. Beyer, “Scattering of Sound by Sound”, J. Acoust. Soc. Am. 32, 339-341 H.C. Woodsum and P.J. Westervelt, "A General Theory for the Scattering of Sound by Sound", Journal of Sound and Vibration , 76, 179-186. T.G. Muir, Office of Naval Research Special Report - "Science, Technology and the Modern Navy, Thirtieth Anniversary , Paper ONR-37, "Nonlinear Acoustics: A new Dimension in Underwater Sound", published by the Department of the Navy Mark B. Moffett and Robert H. Mellen, "Model for Parametric Sources", J. Acoust. Soc. Am. Vol. 61, No. 2, Feb. 1977
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CITEREFWoodsumWestervelt1981 CITEREFWoodsum2006 CITEREFBeyer1974 CITEREFRoyWu1993 CITEREFWestervelt1963 CITEREFCabotPutterman1981 CITEREFBellinBeyer1960 CITEREFMuir1976 CITEREFAlbers1972 CITEREFMoffettMellen1977 CITEREFMoffettMellen1976
dbo:abstract
A parametric array, in the field of acoustics, is a nonlinear transduction mechanism that generates narrow, nearly side lobe-free beams of low frequency sound, through the mixing and interaction of high frequency sound waves, effectively overcoming the diffraction limit (a kind of spatial 'uncertainty principle') associated with linear acoustics. The main side lobe-free beam of low frequency sound is created as a result of nonlinear mixing of two high frequency sound beams at their difference frequency. Parametric arrays can be formed in water, air, and earth materials/rock.
gold:hypernym
dbr:Mechanism
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13087
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wikipedia-en:Parametric_array