What is the primary function of the outer ear?

• A. To collect and direct sound waves into the ear canal
• B. To amplify vibrations from the middle ear to the inner ear
• C. To equalize air pressure on both sides of the eardrum
• D. To convert sound waves into electrical signals

Answer: (A)

Verified step by step guidance

1. Step 1: Understand the anatomy of the outer ear. The outer ear consists of the pinna (auricle) and the external auditory canal. Its structure is designed to collect sound waves from the environment.
2. Step 2: Recognize the primary function of the outer ear. The outer ear's main role is to gather sound waves and funnel them into the ear canal, where they travel toward the eardrum.
3. Step 3: Differentiate the functions of other parts of the ear. The middle ear amplifies vibrations, the inner ear converts sound waves into electrical signals, and the Eustachian tube equalizes air pressure on both sides of the eardrum.
4. Step 4: Eliminate incorrect options based on the anatomy and physiology of the ear. For example, amplification and conversion of sound waves are functions of the middle and inner ear, not the outer ear.
5. Step 5: Conclude that the correct answer is the option describing the outer ear's role in collecting and directing sound waves into the ear canal.