Unknown Average hearing at 500, 1000, 2000 Hz is 45 db in the left ear. Percentage hearing loss in left ear is, when 25 dB loss is considered normal: A 0.45 B 0.2 C 0.3 D 0.4 💡 Explanation Average hearing at 500, 1000, 2000 Hz is 45 db in the left ear. Percentage hearing loss in left ear is, when 25 dB loss is considered normal: ✓ Correct Answer: C. 0.3