Acoustic Monitoring Unit (IMAGE) Cornell University Caption Acoustic monitoring unit in a Sierra Nevada forest. Credit Kristin M. Brunk, Cornell Lab of Ornithology. Usage Restrictions Only for use with articles about this research. License Original 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.