Summary Objectives To determine the quantitative effects of an Tomatis auditory stimulation method using of clinical measures of hearing and cognitive P300 evoked potentials. Method Seventeen patients were included in this study. Nine patients received 100 non-consecutive hours of auditory stimulation, in the form of a personalized program. Eight control subjects did not receive any auditory stimulation. The patients were subjected to a listening test and cognitive auditory MMN (Mismatch Negativity) and P300 evoked potentials test before and after stimulation. The control group was subjected to two distant listening tests (without any interim auditory stimulation). The average time between the two tests was quite similar to that of the patient group. The clinical effects of this form of auditory stimulation were ascertained on the basis of a multiple-choice questionnaire. Results The listening test shows a significant improvement in the reduction in the difference between bone conduction and air conduction in the left ear. The amplitude of the MMN was reduced during the second session - which goes hand in hand with increased latency - and that the reaction times were shorter. We observe a significant decrease in N1/P2 amplitude at the P300 evoked potential. It was also found that a clear and moderate clinical improvement in patients. Conclusion The electrophysiological and hearing measures have been improved significantly in the subjects who received auditory stimulation. To eliminate possible sampling fluctuations or the effect of habituation to the test, they will need to be confirmed on a wider scale. Clinical improvements in patients who received auditory stimulation were observed. However, the correlation between these clinical improvements and the variations in the measuring tests were not examined. Progressive monitoring of the effects of this rehabilitation on the basis of a validated psychometric scale ought to be considered.