Vowel density maps (IMAGE) American Institute of Physics Caption Vowel density maps reveal that distinct vowel spaces for vocalizations of pain, disgust, and joy remain consistent across languages. Credit Ponsonnet et al. Usage Restrictions Journalists may use this image only with appropriate credit and when reporting on 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.