ENT Pure-tone audiometry of a 30 year old field worker shows Carha’s notch. He has the following condition: A Otospongiosis B CSOM C Meniere's disease D Acoustic neuroma 💡 Explanation Pure-tone audiometry of a 30 year old field worker shows Carha's notch. He has the following condition: ✓ Correct Answer: A. Otospongiosis