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. 2010 Aug 5;4:33. doi: 10.3389/fnbeh.2010.00033

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Copyright © 2010 Moss and Surlykke.

This is an open-access article subject to an exclusive license agreement between the authors and the Frontiers Research Foundation, which permits unrestricted use, distribution, and reproduction in any medium, provided the original authors and source are credited.

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Call adjustments for frequency streaming in Eptesicus fuscus. Upper left photo illustrating bats vocalizing in close proximity. Photo taken by Jessica Nelson, and image assembled by Chen Chiu. Upper right plots adjustment in call frequency as a function of baseline call separation across bat pairs. Bats with similar baseline calls made larger adjustments in the end frequency the FM sweep of their calls than those with different baseline calls. Bottom panel shows raw sonar signal recording segment from two bats flying together in close proximity. Call assignment to the vocalizing bat could be made by combining three microphone recordings and 3D video position data. Adapted from Chiu et al. (2009).