User Manual for Optional Spreadsheet Tool - 2018 Acoustic Technical Guidance

NOAA Fisheries seeks public comment on our User Manual for Optional User Spreadsheet Tool (Version 2.0) (User Manual) for NOAA Fisheries’ 2018 Revisions to Technical Guidance for Assessing the Effects of Anthropogenic Sound on Marine Mammal Hearing: Underwater Acoustic Thresholds for Onset of Permanent and Temporary Threshold Shifts (2018 Revised Technical Guidance). This User Manual provides detailed instructions and examples on how to use NOAA Fisheries’ optional User Spreadsheet tool, which incorporates the 2018 Revised Technical Guidance’s acoustic threshold levels to determine whether and how sound-producing activities are expected to result in hearing impacts to marine mammals.