A conductive hearing loss involves problems in which part of the ear?

A conductive hearing loss involves problems in which part of the ear?

• A. Outer or middle ear
• B. Inner ear
• C. Auditory nerve
• D. Cochlear nucleus

Answer: (A)

Conductive hearing loss happens when the trouble is in transmitting sound through the outer or middle ear. Sound waves are collected by the outer ear, travel through the ear canal to the eardrum, and then move through the three tiny middle-ear bones to reach the inner ear. If something disrupts any of those steps—blocked ear canal by wax, fluid or infection in the middle ear, a perforated eardrum, or stiff/abnormally moving ossicles like in otosclerosis—the result is reduced sound reaching the inner ear. The inner ear and the auditory nerve are intact, so the problem lies with sound transmission rather than the sensory transduction itself. In tests, bone-conduction is typically better than air-conduction, producing an air-bone gap that signals a conductive issue. Therefore, conductive hearing loss involves problems in the outer or middle ear.

Conductive hearing loss happens when the trouble is in transmitting sound through the outer or middle ear. Sound waves are collected by the outer ear, travel through the ear canal to the eardrum, and then move through the three tiny middle-ear bones to reach the inner ear. If something disrupts any of those steps—blocked ear canal by wax, fluid or infection in the middle ear, a perforated eardrum, or stiff/abnormally moving ossicles like in otosclerosis—the result is reduced sound reaching the inner ear. The inner ear and the auditory nerve are intact, so the problem lies with sound transmission rather than the sensory transduction itself. In tests, bone-conduction is typically better than air-conduction, producing an air-bone gap that signals a conductive issue. Therefore, conductive hearing loss involves problems in the outer or middle ear.