Slowed-down Dolphin Whistle (AUDIO) University of Cambridge Your browser does not support the audio element. Caption As well as being intelligent and cooperative species, wolves and dolphins have remarkably similar vocal characteristics. If you slow a dolphin whistle down about 30 times, Kershenbaum says it sounds just like a wolf howl. Credit Arik Kershenbaum Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.