This project aims to investigate the neuromodulatory effects of electric brain stimulation (i.e., transcranial alternating current stimulation, tACS) on interhemispheric communication, i.e. speech sound integration. The current project combines dichotic listening, electric brain stimulation, and neuroimaging to better understand where, when, and how neural processing results in integration. Specifically, we aim to understand whether interhemispheric oscillatory coupling is a prerequisite for integration to occur and, if integration does occur, where in the brain the integrated neural representation is situated. This project has broader implications for our understanding of the relationships between neural entrainment, oscillatory phase coupling, and cognitive functioning.