1.Congenital
-Prenatal factors
-Paranatal factors
2.Acquired
Nakshatra Makes FANSI TOPS
Noise induced HL
Meniere's dz
Familial Prog HL
Ac. Neuroma
Noise Induce HL
Sudden HL
Infections
Trauma to labyrinth/ VIIITH nv
Ototoxic drugs
Presbyacusis
Systemic Dz.

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