Movie 1

SAY approach example. Top panel shows received level measured on the Dtag (~5 cm behind the blowhole). Middle panel shows received level measured by the SoundTrap on the target. The insert between the top and middle panels shows a short section of the received levels on the target to better illustrate the echolocation pattern during click packet emission. Lower panel shows ICI (black dots) along with TWTT (left y-axis) and target range (right y-axis) with the latter two depicted as the same red dashed line. In all three panels, the click packets detected using the automated routine are shown in blue. Note that all IPIs are kept above the TWTT, but that ICIs for regular clicks only consistently exceed the TWTT for target ranges below 33 m. Also, note that the automatic packet detector is not perfect as it fails to detect two packets around 15 s and erroneously detects two short low-amplitude click trains at 23.5 and 30.8 s that do not resemble usual packet ICI patterns.