NOAA recently announced the release of a report from a workshop last summer on new tools for visualizing cetacean density and anthropogenic sound. The report is entitled:
National Oceanic and Atmospheric Administration. 2012. Mapping Cetaceans and Sound: Modern Tools for Ocean Management. Final Symposium Report of a Technical Workshop held May 23-24 in Washington, D.C. 83 pp.
and it is available online at: <http://cetsound.noaa.gov>.
Brandon Southall served as a co-chair of the sound field mapping working group in this overall effort.