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dc.contributor.authorNiethammer, Marc
dc.contributor.authorJacobs, Laurence J.
dc.contributor.authorQu, Jianmin
dc.contributor.authorJarzynski, Jacek
dc.date.accessioned2010-03-03T20:09:19Z
dc.date.available2010-03-03T20:09:19Z
dc.date.issued2000-03-23
dc.identifier.citationMarc Niethammer, Laurence J. Jacobs, Jianmin Qu, and Jacek Jarzynski, "Time-frequency representation of Lamb waves using the reassigned spectrogram," Acoustics Research Letters Online, 107:L19-L24, (2000)en
dc.identifier.issn1529-7853
dc.identifier.urihttp://hdl.handle.net/1853/32099
dc.description©2000 Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the Acoustical Society of America. The following article appeared in Acoustics Research Letters Online, 107:L19-L24, 2000 and may be found at http://dx.doi.org/10.1121/1.428894en
dc.descriptionDOI: 10.1121/1.428894
dc.description.abstractThis brief note reports on a study that applies the reassigned spectrogram (the reassigned energy density spectrum of the short-time Fourier transform [STFT]) to develop the dispersion curves for multimode Lamb waves propagating in an aluminum plate. The proposed procedure first uses the spectrogram to operate on a single, laser-generated and detected waveform to develop the dispersion relationship for this plate. Next, a reassignment procedure is used to refine the time-frequency resolution of the calculated dispersion curves. This reassignment operation clarifies the definition of the measured modes. This study demonstrates that the reassigned spectrogram is capable of distinguishing multiple, closely spaced Lamb modes in the ultrasonic frequency range. ©2000 Acoustical Society of America.en
dc.language.isoen_USen
dc.publisherGeorgia Institute of Technologyen
dc.subjectFourier transformsen
dc.subjectAcoustic wave propagationen
dc.subjectAluminiumen
dc.subjectUltrasonic wavesen
dc.subjectTime-frequency analysisen
dc.subjectSpectral analysisen
dc.titleTime-frequency representation of Lamb waves using the reassigned spectrogramen
dc.typeArticleen
dc.contributor.corporatenameGeorgia Institute of Technology. School of Civil and Environmental Engineering
dc.contributor.corporatenameGeorgia Institute of Technology. School of Mechanical Engineering
dc.publisher.originalAcoustical Society of America


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