Browsing Technical Reports by Author "Lyons, Anthony P."
Now showing items 1-4 of 4
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Characteristics of the mediterranean seagrass Posidonia oceanica contributing to high-frequency acoustic scattering
Acunto, Stefano; Lyons, Anthony P.; Pouliquen, Eric (NATO. SACLANTCEN, 2000/05)Posidonia oceanica meadows are the most important ecosystem for the life cycle of coastal Mediterranean benthos with a fundamental role in the primary production of the neritic system and a decisive influence on other ... -
High frequency acoustics in shallow water: proceedings of a conference held in Lerici, Italy, 30 June to 4 July, 1997, organized and sponsored by the NATO SACLANT Undersea Research Centre
High frequency acoustics in shallow water (1997 June 30 - July 4 : Lerici, Italy) (NATO. SACLANTCEN, 1997) -
Penetration of acoustic waves into sandy seafloors at low grazing angles: the Helmholtz-Kirchhoff approach
Pouliquen, Eric; Lyons, Anthony P.; Pace, Nicholas G. (NATO. SACLANTCEN, 1998/08)The Helmholtz-Kirchhoff integral is applied to model the penetration of sound waves into sandy seafloors at grazing angles above and below the critical angle. Although the conditions for the validity -
The effect of a layer of varying density on high-frequency acoustic reflection, forward propagation loss and backscattering strength
Lyons, Anthony P.; Orsi, T.H. (NATO. SACLANTCEN, 1997/06)This report examines the impact that a thin layer of varying density would have on high-frequency reflection, forward loss and backscattering of acoustic plane waves from the seafloor. A functional form for density ...