FY 2018 Source levels of foraging humpback whale calls Fournet, M.E.H., L. Matthews, C.M. Gabriele, D.K. Mellinger, and H. Klinck J. Acoust. Soc. Am., 143(2), EL105–EL111, doi: 10.1121/1.5023599 (2018) Humpback whales produce a wide range of low- to midfrequency vocalizations throughout their migratory range. Non-song “calls” dominate this species’ vocal repertoire while on high-latitude foraging grounds. The source levels of 426 humpback whale calls in four vocal classes were estimated using a four-element planar array deployed in Glacier Bay National Park and Preserve, Southeast Alaska. There was no significant difference in source levels between humpback whale vocal classes. The mean call source level was 137 dBRMS re 1 lPa @ 1m in the bandwidth of the call (range 113–157 dBRMS re 1 lPa @ 1m), where bandwidth is defined as the frequency range from the lowest to the highest frequency component of the call. These values represent a robust estimate of humpback whale source levels on foraging grounds and should append earlier estimates. Feature Publications | Outstanding Scientific Publications Contact Sandra Bigley | Help
