Dolphin vocalizations can only be understood with direct interactions using underwater whistles. This free Android app is for that:<p><i>DC Dolphin Communicator 2019</i><p>https://play.google.com/store/apps/details?id=sm.app.dc&hl=en_CA<p>With source code from:<p>https://gitlab.com/leafyseadragon/android-dolphin-comm-app<p>https://gitlab.com/leafyseadragon/android-acoustic-lib