Spatial field shifts in ocean acoustic environmental sensitivity analysis

被引：0

作者：

Dosso, Stan E. ^{[1
]}

Morley, Michael G. ^{[1
]}

Giles, Peter M. ^{[2
]}

Brooke, Gary H. ^{[2
]}

McCammon, Diana F. ^{[3
]}

Pecknold, Sean ^{[4
]}

Hines, Paul C. ^{[4
]}

机构：

[1] School of Earth and Ocean Sciences, University of Victoria, Victoria, BC V8W 3P6, Canada

[2] General Dynamics Canada, 3785 Richmond Road, Ottawa, ON K2H 5B7, Canada

[3] McCammon Acoustical Consulting, 475 Baseline Rd., Waterville, NS B0P 1V0, Canada

[4] Defence Research and Development Canada-Atlantic, Dartmouth, NS B2Y 3Z7, Canada

来源：

Journal of the Acoustical Society of America | 2007年 / 122卷 / 05期

关键词：

This article examines the effects of spatial field shifts in ocean acoustic environmental sensitivity analysis. Acoustic sensitivity studies are typically based on comparing acoustic fields computed for a reference environmental model and for a perturbed model in which one or more parameters have been changed. The perturbation to the acoustic field due to the perturbed environment generally includes a component representing a spatial shift of the field (i.e; local field structure remains coherent; but shifts in range and/or depth) and a component representing a change to the shifted field. Standard sensitivity measures based on acoustic perturbations at a fixed point can indicate high sensitivity in cases where the field structure changes very little; but is simply shifted by a small spatial offset; this can conflict with an intuitive understanding of sensitivity. This article defines and compares fixed-point and field-shift corrected sensitivity measures. The approaches are illustrated with examples of deterministic sensitivity (i.e; sensitivity to a specific environmental change) and stochastic sensitivity (sensitivity to environmental uncertainty) in range-independent and range-dependent environments. © 2007 Acoustical Society of America;

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摘要：

Journal article (JA)

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页码：2560 / 2570