batch_auto_20260713 202607131256465730 BOEM ESP geoESPIS ESPIS@boem.gov Bureau of Ocean Energy Management Passive Acoustic Monitoring (PAM) Program for the Northern Gulf of Mexico; Task 1, literature review HDR, Inc. HDR, Inc. Readily available literature and data on prior and ongoing passive acoustic monitoring (PAM) projects in the three Bureau of Ocean Energy Management’s (BOEM) planning areas in the Gulf of Mexico (GOM) (Eastern, Central, and Western) were searched and compiled with online databases, literature, and Internet. The search focused on gathering a variety of literature types on biological and physical ambient noise levels in the GOM. The review also focused on PAM projects for marine mammals in the GOM and on anthropogenic sound sources in the region. The focus was on collecting information from the last 15 years of studies; some research in the GOM was included as far back as 1991. 83165 U.S. Department of the Interior, Bureau of Ocean Energy Management, Environmental Studies Program https://doi.org/10.13039/100012475 M17PD00011 10.67297/9A1E40 https://boem.gov/awardpages/100288