The goal for this study is to compare performance between a conventional helium based “Cryo_MEG” (magnetoencephalography) system and an investigational optically pumped (‘OP_MEG’) MEG system using brain recordings from typically developing adults. MEG (magnetoencephalography) is a safe, non-invasive brain imaging method used in many forms of research as well as clinical care. MEG is measured by safely wearing a helmet filled with MEG sensors. During the MEG scan, you will be asked to look at a screen, listen to some tones, and push a button. OPM (Optically Pumped Magnetometry), is a brain imaging method that is also worn as a helmet and acquires MEG recording data but differs from conventional “cryo-MEG” because OPM sensors can be positioned closer to the head. This may present an opportunity for better measurement of underlying brain activity.