This document discusses hearing impairment and its subcategories. It explains that conductive hearing loss occurs when sound is decreased due to problems in the outer or middle ear. Sensorineural hearing loss refers to issues in the inner ear or along the nerve pathway to the brain. Mixed hearing loss means a person has both conductive and sensorineural problems. Common causes include earwax buildup, infections, bone abnormalities, or damage to the inner ear. Symptoms can impact areas like understanding grammar, taking notes, participating in discussions, and presenting oral reports.