Sound reaches maximum amplitude depending on its frequency at:
Ref: Diseases of Ear, Nose & Throat, by Dhingra 5th edition. Chapter on Physiology of EarExplanation:A sound wave depending on its frequency reaches maximum amplitude on a particular place on hasilar membrane and stimulates that segment.Higher frequencies are represented in the basal turn of cochlea and progressively lower ones towards the apex.
Tympanic membrane
Ear ossicles
Semicircular canals
B asilar membrane
Physiology of Ear