Linked from
The 9 pages that link to Tonotopy, each with the reason it gives.
CochleaRelated: The cochlea maps high and low frequencies to different positions along its length.
Cochlear implantRelated: Electrode placement uses the cochlea's frequency map to encode pitch.
Auditory nerveRelated: The cochlea’s frequency map is preserved across auditory nerve fibers.
Auditory cortexRelated: Frequency maps organize sound responses across primary auditory cortex.