Whales in Space: Experiencing Aquatic Animals in Their Natural Place with the Hydroambiphone ...

• Main Authors: Crutchfield, James P., Dunn, David D., Jurgens, Alexandra M.
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: arXiv 2023
• Subjects: Populations and Evolution q-bio.PE; Fluid Dynamics physics.flu-dyn; FOS Biological sciences; FOS Physical sciences; Megaptera novaeangliae; Alaska
• Online Access: https://dx.doi.org/10.48550/arxiv.2312.16662; https://arxiv.org/abs/2312.16662

Recording the undersea three-dimensional bioacoustic sound field in real-time promises major benefits to marine behavior studies. We describe a novel hydrophone array -- the hydroambiphone (HAP) -- that adapts ambisonic spatial-audio theory to sound propagation in ocean waters to realize many of these benefits through spatial localization and acoustic immersion. Deploying it to monitor the humpback whales (Megaptera novaeangliae) of southeast Alaska demonstrates that HAP recording provides a qualitatively-improved experience of their undersea behaviors; revealing, for example, new aspects of social coordination during bubble-net feeding. On the practical side, spatialized hydrophone recording greatly reduces post-field analytical and computational challenges -- such as the "cocktail party problem" of distinguishing single sources in a complicated and crowded auditory environment -- that are common to field recordings. On the scientific side, comparing the HAP's capabilities to single-hydrophone and ... : 11 pages, 4 figures; https://csc.ucdavis.edu/~cmg/compmech/pubs/whalesinspace.htm ...