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. 2019 Apr 13;71(Suppl 2):1523–1528. doi: 10.1007/s12070-019-01655-5
Systematic Tinnitus Classification
Objective tinnitus
Subjective tinnitus
      Conductive tinnitus*
      Sensorineural tinnitus*
            Type I (motor tinnitus)
            Type II (transduction tinnitus)
            Type III (transformation tinnitus)
            Type IV (extrasensory tinnitus)
      Central tinnitus
             Primary central tinnitus
             Secondary central (centralized) tinnitus

*Conductive tinnitus and sensorineural tinnitus form the peripheral tinnitus