An Investigation of the Bellhop Acoustic Prediction Model: Capabilities, Tests, Recommendations and User Guide

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Authors
  1. McCammon, D.F.
Corporate Authors
Defence R&D Canada - Atlantic, Dartmouth NS (CAN);McCammon Acoustical Consulting, Waterville NS (CAN)
Abstract
This report documents some of the capabilities and limitations of the Bellhop-DRDC model and describes the alterations required to make the code compatible with DRDC’s Environment Modeling Manager for use in the frequency range 50 Hz to 1500 Hz. It presents examples of the output forms that are possible using a Scotia shelf example. The report documents the accuracy of the range dependence and frequency response of Bellhop-DRDC by tests with a parabolic equation. The lack of high quality bottom treatment is probably the greatest limitation on accuracy in bottom limited cases in the present configuration of Bellhop-DRDC. This report discusses possible options for improving the bottom loss methodology by seeking an alternative to the MGS province database and loss curves. Other additions that would also enhance the capabilities of Bellhop-DRDC include adding a beam pattern capability and computing a standard deviation output to quantitatively describe the sensitivity of the transmission loss to uncertainty in the inputs. A user guide is included in Appendix B.

Il y a un résumé en français ici.

Keywords
Acoustic prediction;Sonar;Fortran programming;Ocean acoustics;EMM (Environmental Modeling Manager)
Report Number
DRDC-ATLANTIC-CR-2004-285 — Contractor Report
Date of publication
01 Nov 2005
Number of Pages
68
DSTKIM No
CA027081
CANDIS No
525115
Format(s):
CD ROM

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