Acoustic Signal Audio (AUDIO) Curtin University Your browser does not support the audio element. Caption These are acoustic signals recorded by the Integrated Marine Observing System sound recorder west of Rottnest Island. Credit Curtin University 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.