Accession Number : ADA137380

Title :   An Investigation of Acoustic Interaction with the Ocean Bottom from Experimental Time Series Generated by Explosive Sources.

Descriptive Note : Technical rept.,


Personal Author(s) : Knobles,D P

PDF Url : ADA137380

Report Date : 01 Dec 1983

Pagination or Media Count : 99

Abstract : Received time series from explosive sources in an abyssal plains ocean environment are compared to simulated time series calculated by a ray theory model. The comparisons yield information concerning the geoacoustic profile with a single sediment layer. The comparisons are made in various frequency bands to aid in identifying sediment penetrating arrivals by taking advantage of the frequency dependence of the absorption of the sediment. For shorter ranges, the sediment penetrating rays reflect off the basement. Also, as the range decreases, the fraction of received energy due to reflections at the water-sediment interface increases. Discrepancies between the experimental and simulated time series are interpreted in terms of reflections from thin layers within the sediment and scattered basement reflections.

Descriptors :   *Bottom bounce, Underwater explosions, Underwater sound, Sound transmission, Interactions, Ocean bottom, Sediments, Layers, Acoustic absorption, Acoustic reflection, Penetration, Time series analysis

Subject Categories : Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE