Final answer:
Postnatal hearing loss can have different causes, such as conductive or sensorineural hearing loss. Barotrauma is not typically associated with postnatal hearing loss.
Step-by-step explanation:
Barotrauma is not typically associated with postnatal hearing loss. It is a condition that occurs due to changes in pressure, often affecting the middle ear. However, there are several causes of postnatal hearing loss, such as conductive hearing loss and sensorineural hearing loss. Conductive hearing loss can be caused by blockages in the ear canal, problems with the eardrum or ossicles, or fluid in the middle ear. Sensorineural hearing loss, on the other hand, can be caused by aging, head or acoustic trauma, infections, medications, environmental effects, tumors, and toxins.