In noise induced hearing loss , audiogram shows a Boiler's notch at ?
Noise induced hearing loss Boiler notch at 4000 HZ Max seen at 3000 - 6000 HZ Sterocilia of outer hair cells are 1st to be affected . Carha's notch - dip is present at 2000 HZ .(seen in otosclerosis)
1000 Hz
2000 Hz
3000 Hz
4000 Hz
Otosclerosis