Headphones (IMAGE) Rutgers University Caption Engineers conducted experiments with "dumb" headphones with estimated prices ranging from $2.99 to $15,000. HeadFi can transform such headphones into smart ones. Credit Xiaoran Fan 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.