What is the primary function of the outer ear?

What is the primary function of the outer ear?

• A. To capture and funnel sound to the tympanic membrane.
• B. To convert sound to neural signals.
• C. To protect the inner ear.
• D. To modulate loudness.

Answer: (A)

The outer ear mainly gathers sound and guides it toward the eardrum. The pinna plus the external auditory canal collect acoustic energy, shape some frequencies through resonance, and funnel the waves to the tympanic membrane so it can vibrate in response. The actual conversion of sound into neural signals happens in the inner ear (the cochlea) with hair cells, not in the outer ear. The outer ear also helps protect the ear to some extent, but its primary role is capturing and directing sound toward the eardrum. Modulating loudness involves the middle-ear muscles and inner-ear processing, not the outer ear.

The outer ear mainly gathers sound and guides it toward the eardrum. The pinna plus the external auditory canal collect acoustic energy, shape some frequencies through resonance, and funnel the waves to the tympanic membrane so it can vibrate in response. The actual conversion of sound into neural signals happens in the inner ear (the cochlea) with hair cells, not in the outer ear. The outer ear also helps protect the ear to some extent, but its primary role is capturing and directing sound toward the eardrum. Modulating loudness involves the middle-ear muscles and inner-ear processing, not the outer ear.