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dc.contributor.advisorIsakson, Marcia J.en
dc.contributor.advisorEzekoye, Ofodike A.en
dc.creatorHron, Joel Mauriceen
dc.date.accessioned2011-07-12T14:22:48Zen
dc.date.available2011-07-12T14:22:48Zen
dc.date.issued2011-05en
dc.date.submittedMay 2011en
dc.identifier.urihttp://hdl.handle.net/2152/ETD-UT-2011-05-2911en
dc.descriptiontexten
dc.description.abstractThis research experimentally shows the effect of sediment roughness characteristics on the acoustic reflection coefficient. This information is useful when trying to classify various types of sediment over an area. This research was conducted in an indoor laboratory tank at Applied Research Laboratories (ARL) at the University of Texas at Austin. A single beam echo-sounder (SBES) system was developed to project and receive a wideband (3 kHz to 30 kHz) acoustic pulse. A method was developed using the system transfer function to create a custom pulse that would minimize the dynamic range over the wide frequency band. A matched filtering and data processing algorithm was developed to analyze data over the full frequency bandwidth and over smaller frequency bands. Analysis over the smaller frequency bands showed the effect of the roughness on the reflection coefficient with respect to frequency. It was found that the reflection coefficient is significantly lower at the higher frequencies (above 20 kHz) than at the lower frequenices [sic] due to off specular scattering. It was also found that the variability of the reflection coefficient was significantly higher for the rough sediment than for the smooth sediment.en
dc.format.mimetypeapplication/pdfen
dc.language.isoengen
dc.subjectAcousticsen
dc.subjectSediment characterizationen
dc.subjectSediment roughnessen
dc.subjectReflection coefficienten
dc.subjectSingle beam echo-sounderen
dc.subjectSignal processingen
dc.titleThe importance of sediment roughness on the reflection coefficient for normal incidence reflectionsen
dc.date.updated2011-07-12T14:23:07Zen
dc.identifier.slug2152/ETD-UT-2011-05-2911en
dc.description.departmentMechanical Engineeringen
dc.type.genrethesisen
thesis.degree.departmentMechanical Engineeringen
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorUniversity of Texas at Austinen
thesis.degree.levelMastersen
thesis.degree.nameMaster of Science in Engineeringen


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