What is the name of structure B? 
Definitions:
Auditory Hair Cells
Sensory cells located in the cochlea of the inner ear that convert sound waves into electrical signals for the brain to interpret as sound.
Rods and Cones
Photoreceptor cells in the retina of the eye, with rods being responsible for vision at low light levels and cones being responsible for color vision and detail.
Pitch Perception
The process by which sounds are interpreted as being high or low, dependent on the frequency of the sound waves.
Frequency Theory
A theory in hearing that suggests the perception of pitch is related to the frequency at which the entire basilar membrane vibrates.
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