1. Auditory Anatomy
Outer Ear — Quiz
Test your understanding of outer ear with 5 practice questions.
Practice Questions
Question 1
Which of the following anatomical features of the pinna is most responsible for creating a natural sound shadow that aids in front-back sound localization?
Question 2
The external auditory canal's cartilaginous portion contains hair follicles and sebaceous glands. What is the primary protective function of these structures?
Question 3
A patient is diagnosed with otitis externa, an inflammation of the external auditory canal. Which of the following symptoms is most characteristic of this condition, specifically related to the outer ear's anatomy?
Question 4
The external auditory canal acts as a resonant tube, enhancing certain frequencies. If the speed of sound in air is approximately $343\text{ m/s}$ and the average length of the adult human external auditory canal is $2.5\text{ cm}$, which of the following is the approximate fundamental resonant frequency?
Question 5
Beyond its protective role, what is the primary acoustic effect of the 'S' shape or curvature of the external auditory canal?