Introduction: Magnetic stimulation is a non-invasive method of stimulating brain and peripheral nervous system using induced currents, when used to stimulate brain it is normally referred to as Transcranial magnetic stimulation (TMS). The last decade has seen a rapid increase in applications of TMS to study cognition, behavior relations and the pathophysiology of various neurologic and psychiatric disorders. Further increase in the widespread use of TMS in medical therapeutic and research applications is expected. This makes the need for clear and updated safety guidelines and recommendations of proper practice and application critical. Aims & Objectives: The main aims and objectives of this study is to find out the noise induced auditory changes in patients receiving TMS treatment. Changes were measured with Pure tone audiometry and DPOAE’s data obtained compared reliability. Materials & Methods: 42 Patients with diagnosis of double drug resistant depression and schizophrenia were included in this study. Baseline PTA and DPOAE's performed and repeated at 1,3,6 month interval. Result: Patients developed transient SNHL after TMS noise exposure which improved and come to near normal in one month. One patient had persistent SNHL. Data from PTA and DPOAE's were compared which found to be correlate with clinical finding after TMS noise exposure. Conclusion: The present study is one of the few studies done till now to study the changes on distorted product of otoacoustic emissions (DPOAEs), its shows OAEs are better to study the noise induced auditory threshold changes when comparing with pure tone threshold(PTA) results.
