Shake, shake up and down strokes of the eardrum are carried forward to a later section in the ear, ear section in cells with hair clumps. 30,000 rod cells.
Resonant vibration of the eardrum to vibrate up and down are transported forward to the in-ear. The inner ear contains hair cells that are clustered. Array of 30,000 cells
Vibrating up and down beat vibration of the eardrum is transported forward to the ear. Within the ear in a cell with a tuft of fur lined, story 30 000 cells.