acuumbot with trashcan (IMAGE) University of Maryland Caption Researchers repurposed the laser-based navigation system on a vacuum robot (right) to pick up sound vibrations and capture human speech bouncing off objects like a trash can placed near a computer speaker on the floor. Credit Sriram Sami 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.