Abstract
The purpose of this study is to identify and quantify the difference in detections of a subsurface target from a subsurface sensor source between range-independent and range-dependent versions of the same acoustic propagation model. Environmental data were pulled from open source databases to provide an application for the comparison and using novel measures of merit, the authors were able to quantify the difference in detection performance between models. This study suggests that provided multiple types of environments are considered, it is possible to use a range-independent model to give good approximations to the accuracy of detections, one would achieve using a full range-dependent sound propagation model.
Highlights
When choosing the types of models to use for an acoustic study, one can consider two fundamental types of sound propagation model: a range-independent or range-dependent one
In the sections that follow range-independent and range-dependent versions of the Bellhop model will be compared to investigate the effects of using a range-independent underwater acoustic propagation model in an area known as the Scotian Shelf, where there exists a case of pronounced range dependence across the continental shelf break
The red circles correspond to the range-independent environment
Summary
When choosing the types of models to use for an acoustic study, one can consider two fundamental types of sound propagation model: a range-independent or range-dependent one. This question must be considered carefully, since the requirements of processing and. In reality, SSPs, bathymetry and reflection loss are all location dependent and vary with range and azimuth within a single scenario This reality is what is driving the requirement for this study, to better understand the impact of using a range-independent model to approximate what we know is real: a range-dependent environment in which sound travels. In the sections that follow range-independent and range-dependent versions of the Bellhop model will be compared to investigate the effects of using a range-independent underwater acoustic propagation model in an area known as the Scotian Shelf, where there exists a case of pronounced range dependence across the continental shelf break
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