Which structure carries sound waves to the eardrum?

Which structure carries sound waves to the eardrum?

• A. Auditory canal
• B. Pinna
• C. Tympanic membrane
• D. Ossicles

Answer: (A)

Sound energy travels from outside the ear into the external auditory canal, a channel that directs the waves toward the eardrum. The canal’s role is to carry the sound to the tympanic membrane, where the vibrations begin the process of hearing. The outer structure known as the pinna helps collect and funnel sound but doesn’t serve as the direct conduit to the eardrum. The tympanic membrane is the eardrum itself and is the surface that vibrates in response to the incoming waves, not the carrier. Behind the eardrum, the ossicles (the tiny bones) transmit and amplify those vibrations into the inner ear.

Sound energy travels from outside the ear into the external auditory canal, a channel that directs the waves toward the eardrum. The canal’s role is to carry the sound to the tympanic membrane, where the vibrations begin the process of hearing. The outer structure known as the pinna helps collect and funnel sound but doesn’t serve as the direct conduit to the eardrum. The tympanic membrane is the eardrum itself and is the surface that vibrates in response to the incoming waves, not the carrier. Behind the eardrum, the ossicles (the tiny bones) transmit and amplify those vibrations into the inner ear.