Cochlear implants (CIs) are neural prostheses that enable severely hearing-impaired to understand speech. However, outcome is highly variable and multimodal training strategies including haptic stimulation might contribute to this aim. Given that the temporal cortex has been shown to be necessary for vibrotactile temporal discrimination, we aimed to investigate the impact of hearing loss and restoration on vibrotactile perception in adults.Therefore, we conducted a 32-channel EEG during a passive perception task and two oddball tasks using a standard stimulus (250 Hz, 100 ms) and a target with a different frequency (700 Hz) or duration (50 ms). So far, 13 adults (6 female) with postlingual hearing loss with a mean age of 56.5 (16.1) have been tested before and 6 months after cochlear implantation.Preoperatively, target discrimination was close to chance levels (d’=0) in the frequency (mean=0.685) and in the duration task (mean=0.813). There was no difference in discrimination performance between both tasks (t(12)=-0.782, p=0.449). After implantation, frequency discrimination significantly increased (mean=1.6) compared to preoperative frequency discrimination (t(12)= -3.251, p=0.007). Instead, duration discrimination did not change (t(12)=-0.75, p=0.468). Therefore, after implantation frequency discrimination was significantly better than duration discrimination (t(12)= 2.462, p=0.03).Our data underline the important metamodal role of the auditory cortex in frequency discrimination. Furthermore, the results of the present study hint that sensory changes caused by hearing deprivation can be reverted after sensory restoration. In the future, we aim to analyze the link between behavioral and electrophysiological measurements and speech perception after cochlear implantation.