Consecutive Dual-Session tDCS in Chronic Subjective Severe to Catastrophic Tinnitus With Normal Hearing

Inclusion Criteria: * Individuals who have experienced subjective tinnitus for over 3 months. * Individuals with normal hearing, defined as an average pure tone threshold of less than 25 dB between 0.5-4 kHz, and the presence of the V wave at 30 dBnHL with a difference in V wave latency of less than 0.2 ms in both ears during the ABR test. * Individuals with severe tinnitus, as indicated by a Tinnitus Handicap Inventory (THI) score of 58 or higher, and who have been assessed for symptoms of anxiety and depressive mood using the Beck Depression Inventory (BDI) questionnaire. Exclusion Criteria: * Those requiring treatment for neurological disorders such as epilepsy, migraine, or intracranial masses. * Pregnant individuals on the day of providing consent and those with metal-based electric implantable prosthetics. * Individuals with objective or somatic tinnitus, auditory hallucinations, unwillingness to provide written consent, or unwillingness to continue the trial, and those who have participated in previous trials involving tDCS for tinnitus.