Analysis of Main Acoustic Parameters (IMAGE) Université de Genève Caption On top: Analysis of main acoustic parameters underlying differences in the voices (speakers) and in the speech sounds (phonemes) in the pseudo-words themselves: high spectral modulations best differentiate the voices (blue spectral profile), and fast temporal modulations (red temporal profile) along with low spectral modulations (red spectral profile) best differentiate the speech sounds. At the bottom: Analysis of neural, fMRI data: during performance of the voice task, the auditory cortex amplifies higher spectral modulations (blue spectral profile), and during performance of the phoneme task, it amplifies fast temporal modulations (red temporal profile) and low spectral modulations (red spectral profile). These amplification profiles are highly similar to the acoustic profiles to differentiate between the voices and the phonemes. Credit © UNIGE 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.