The invention relates to a device for determining acoustically evoked brain potentials in brainstem audiometry from electrodes applied to the head of a subject, where the device comprises a plurality of electrodes, i.e. at least one pickup electrode and a reference electrode, to be applied at different points of the head, where the device comprises means for determining the impedance between the electrodes and the head as well as means for visually indicating a level of impedance or delivering this informaiton to the connected audiometer.
DEVICE FOR DETERMINING ACOUSTICALLY EVOKED BRAIN POTENTIALS