Welcome to the ...  Ocean Acoustics Library





Normal Modes
Parabolic Equation
Wavenumber integration
Experiments and Data



(updated Jan. 4, 2019)
Related sites
The Student Page
Sound and Marine Mammals

Featured new additions/links

Acoustics Toolbox:
Broadband version of SCOOTER; additional noise modeling tools and examples.
 (Updated 9 March 2019)

arlpy, a Python interface to BELLHOP (New September 2018)
(Mandar Chitre, National University of Singapore)

Bokodapviewer for accessing environmental data from servers. (YouTube demo.)
(Marcus Donnelly, SEA Ltd., UK)
(New 29 September 2017)

Errata for Computational Ocean Acoustics (JKPS) (New 4 August 2017)

AcousticPy: Runs the test cases for the Acoustic Toolbox and provides components to read and plot various files
(Orlando Rodríguez, Univ. of Algarve, Portugal) (New 3 August 2017)

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

Aquatic Acoustic Archive (A3)

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

In consultation with the Office of Naval Research, the Ocean Acoustics Library is moving. The new url is https://oalib-acoustics.org/. I'll be stepping down from the role of maintaining this site. Ying Tsong Lin (YT) and Arthur Newhall at Woods Hole Oceanographic Institute are assuming that role. I assume there will be new contact information for them shortly on the new site (ytlin@whoi.edu and anewhall@whoi.edu). Sometime within the next few months, we'll make a change here so that you're automatically redirected.

I’m hoping that this website at its new home will continue as a useful resource to the ocean acoustics/acoustical oceanography communities and in fact develop into something increasingly valuable as YT and Arthur take it in new directions. New ideas/new energy ... should be a great thing.

During this migration you may see some of the components of oalib.hlsresearch.com disappear--- check the new site for anything you find missing.

Thanks to everyone that has contributed to this site. On a historical note, oalib goes back to the mid-1990's and was originally conceived by ONR. They have always been enthusiastic supporters.

Have you found it useful? Then perhaps you would think about giving something back by contributing software or data. It's no longer my editorial call but I imagine YT and Arthur will be very enthusiastic to receive suggested contributions from our international community.

Best wishes for the new year!

Mike Porter


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.

Contributions in the form of announcements, documented software, or suggestions for improving this site are encouraged:

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Sound in the Sea