Activation of Auditory Cortex (IMAGE) Physikalisch-Technische Bundesanstalt (PTB) Caption This illustration shows activation of the auditory cortex during stimulation of the ear by low-frequency sound and infrasound. Credit Max-Planck Institut für Bildungsforschung 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.