Welcome to the ...  Ocean Acoustics Library





Normal Modes
Parabolic Equation
Wavenumber integration




Related sites
The Student Page
Sound and Marine Mammals

Featured new additions/links

TRACEO3D: Beam tracing code for 3D (Orlando Rodríguez, Univ. of Algarve, Portugal) (New 25 June 2017)

Underwater Acoustics class notes (C.T. Tindle, Univ. of Auckland) (New 29 March, 2017)

NLBCPE: Nonlocal Boundary Condition PE and its adjoint (Xiaofeng Zhao (赵小峰) PLA Univ. of Science and Tech., China)
(new March 19, 2017)

Analytic solution for the elastic penetrable wedge shaped ocean (mod of the Petrov code).
(New 19 March 2017)
(唐骏 Jun Tang, College of Underwater Acoustic Engineering, Harbin Engineering University

Python Scripts for reading/writing BELLHOP and KRAKEN input/output files
(Orlando Rodriguez/Univ. of Algarve) (New 29 December 2016)

rimLG: A Legendre-Galerkin code for calculating normal-modes
(Richard Evans) (updated 6 December 2016)

Aquatic Acoustic Archive (A3)

PocketBook of Underwater Acoustics (3rd Ed.)
compiled by Christine Erbe
(JASCO Applied Sciences; contact Roberto Racca with corrections or questions)

The Ocean Acoustics library contains acoustic modeling software and data. It is supported by the U.S. Office of Naval Research (Ocean Acoustics Program) as a means of publishing software of general use to the international ocean acoustics community.

Global Shipping Noise

Shipping noise is an important part of the ocean 'environment', and presents interesting modeling problems. The upper figure shows shipping-noise source-level densities at 200 Hz. The shipping lanes are clearly visible. The colors represent dB re: 1 microPa2 /Hz @ 1m/m2.  These source level maps can then be convolved with the propagation characteristics of the ocean channel to show the resulting 'illumination' or ensonification of the ocean. The level is displayed as a Noise Spectral Density with a scale in dB referenced to 1 microPascal ^2/Hz. (Also available as a KMZ file.)  Caution: these are preliminary (DRAFT) results presented to illustrate the process. The source level is derived from shipping data provided by Carrie Kappel/NCEAS.  (This page highlights current research projects in ocean acoustics. Suggestions welcome.) Previous FrontPages.

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