title: In situ measurements of sediment acoustic properties in Currituck Sound and comparison to models.
abstract: In situ measurements of compressional and shear wave speed and attenuation were collected 30 cm below the water-sediment interface in Currituck Sound, North Carolina at two field locations having distinctly different sediment types: medium-to-fine-grained sand and fine-grained sand with approximately 10% mud content. Shear wave measurements were performed with bimorph transducers to generate and receive horizontally polarized shear waves in the 300 Hz to 1 kHz band, and compressional wave measurements were performed using hydrophones operated in the 5 kHz to 100 kHz band. Sediment samples were collected at both measurement sites and later analyzed in the laboratory to characterize the sediment grain size distribution for each field location. Compressional and shear wave speed and attenuation were estimated from the acoustic measurements, and preliminary comparisons to the extended Biot model by Chotiros and Isakson [J. Acoust. Soc. 135, 3264-3279 (2014)] and the viscous grain-shearing theory by Buckingham [J. Acoust. Soc. 136, 2478-2488 (2014)] were performed.
authors.affiliation: Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.
authors.forename: Kevin M
authors.initials: KM
authors.lastname: Lee
authors.affiliation: Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.
authors.forename: Megan S
authors.initials: MS
authors.lastname: Ballard
authors.affiliation: Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.
authors.forename: Andrew R
authors.initials: AR
authors.lastname: McNeese
authors.affiliation: Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.
authors.forename: Thomas G
authors.initials: TG
authors.lastname: Muir
authors.affiliation: Applied Research Laboratories, The University of Texas at Austin, P.O. Box 8029, Austin, Texas 78713-8029, USA.
authors.forename: Preston S
authors.initials: PS
authors.lastname: Wilson
authors.affiliation: U.S. Army Engineer Research and Development Center, Geotechnical and Structures Laboratory, 3909 Halls Ferry Road, Vicksburg, Mississippi 39180-6199, USA.
authors.forename: R Daniel
authors.initials: RD
authors.lastname: Costley
authors.affiliation: Coastal and Hydraulics Laboratory, U.S. Army Corps of Engineers Field Research Facility, 1261 Duck Road, Kitty Hawk, North Carolina 27949-4472, USA.
authors.forename: Kent K
authors.initials: KK
authors.lastname: Hathaway