Gerald is a 49 year old plumber who presents to the GP with a 2 month history of recurrent left sided ear discharge. He has been treated on multiple occasions over the past 4 months for otitis media. He reports some reduced hearing in the left ear and denies any earache or tinnitus.
On examination you observe scanty purulent discharge in the left ear canal and a retraction pocket in the tympanic membrane.
Based on the likely diagnosis, which of the below findings on hearing tests would most likely correlate?
