Hearing Results for the Early Hominins (image) Binghamton University Share Print E-Mail Caption These are hearing results for the early hominins. Points higher on the curve indicate greater auditory sensitivity. Note the sharp dropoff in sensitivity above about 3 kHz. Credit Rolf Quam Usage Restrictions None Share Print E-Mail 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.