["While motor effects of dopaminergic medication and subthalamic nucleus deep brain stimulation (STN-DBS) in Parkinson's disease (PD) patients are well explored, their effects on sensory processing are less well understood. Here, we studied the impact of levodopa and STN-DBS on auditory processing.", 'Rhythmic auditory stimulation (RAS) was presented at frequencies between 1 and 6Hz in a passive listening paradigm. High-density EEG-recordings were obtained before (levodopa ON/OFF) and 5months following STN-surgery (ON/OFF STN-DBS). We compared auditory evoked potentials (AEPs) elicited by RAS in 12 PD patients to those in age-matched controls. Tempo-dependent amplitude suppression of the auditory P1/N1-complex was used as an indicator of auditory gating.', 'Parkinsonian patients showed significantly larger AEP-amplitudes (P1, N1) and longer AEP-latencies (N1) compared to controls. Neither interruption of dopaminergic medication nor of STN-DBS had an immediate effect on these AEPs. However, chronic STN-DBS had a significant effect on abnormal auditory gating characteristics of parkinsonian patients and restored a physiological P1/N1-amplitude attenuation profile in response to RAS with increasing stimulus rates.'] Does subthalamic deep brain stimulation improve auditory sensory gating deficit in Parkinson 's disease?