Carhart's notch dips at:: (A) 2 Hz, (B) 200 Hz, (C) 2000 Hz, (D) 2000 MHz
Answer is C. Ans. (c) 2000 Hz* Carhart Notch is an audiogram finding and is an important feature in patients with Otosclerosis.* There is a sudden dip (notch) at 2000 Hz in bone conduction curve.* Carhart s notch disappears after stapedectomy.