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The basilar membrane is a structure that has hair cells embedded within it. These hair cells become enlarged when fluid inside the cochlea moves.

Basilar Membrane

Hair cells are embedded in the basilar membrane and become enlarged due to the movement of fluid inside the cochlea. Once enlarged, they send neural impulses to the brain via the auditory nerve.

Hair Cells

An individual experiences a specific type of hearing loss where they can perceive low-frequency sounds (like a deep bass drum) normally, but have significant difficulty hearing high-frequency sounds (like a high-pitched whistle). This damage is located within the snail-shaped, fluid-filled structure of the inner ear. Explain how the varying physical properties along the length of the basilar membrane account for this specific pattern of hearing loss.

Frequency-Specific Hearing Loss

An individual sustains an injury that specifically damages the narrow, stiff base of the basilar membrane, located near the oval window. Based on the physical properties of this structure and how it processes sound waves, which auditory capability would be most directly affected?

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