Clinical classification of tinnitus severity according to Biesinger et al.:
| Grade | Description of tinnitus severity |
| I | well compensated, no suffering |
| II | Occurs mainly in silence and is disruptive under stress and strain |
| III | Leads to permanent impairment in the private and professional spheres; disturbances occur in the emotional, cognitive and physical spheres |
| IV | Leads to complete decompensation in the private sphere and occupational disability |
