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

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)

AGORA (Airgun Array Signature Model) (New 29 December 2015)
(H. Ozkan Sertlek, University of Leiden, The Netherlands

Long-Range Acoustics modeling tools including updated versions of EIGENRAY, an new OPENMP/MPI Parabolic Equation Model.(B. Dushaw, Applied Physics Laboratory, U. Washington)) (new August 2015)

Update of  USML: Undersea Modeling Library with WaveQ3D beam tracing code(S. Reilly, Univ. Rhode Island and AEgis Technologies Group) (May 2015)

Update of TRACEO Beam Tracing code [see also the SiPLAB site] Tracing code (May 2015)
(O. Rodríguez and Emanuel Ey, Univ. Algarve, Portugal)

Update of the Acoustics Toolbox including KRAKEN and BELLHOP. (28 January 2015).

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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Newsworthy stuff:
Sound in the Sea