Bat hearing sensitivity equipment (IMAGE) Smithsonian Tropical Research Institute Caption Instead of bringing the bats to the equipment–researchers took this portable hearing test to the rainforest, where they were able to test the auditory responses of both common and rare bats to a range of sounds. This information will help them understand how different bat species use sensory information as they hunt. Credit STRI Usage Restrictions Credit must be given to the creator. Only noncommercial uses of the work are permitted. License CC BY-NC 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.