Symbol 'X' denotes
Air conduction threshold for right ear
Bone conduction threshold for right ear
Air conduction threshold for left ear
Bone conduction threshold for left ear
.An "O" often is used to represent responses for the right ear and an "X" is used to represent responses for the left ear. A key on the audiogram, similar to one found on a map, identifies what the different symbols mean Hence, indicates air conduction test for left year Ref physiology textbook A. K Jain.. 3e
All India exam