a boy is listening to a radio. The loud speakers plays a musical note by vibrating 256 times each second. How many time does the boys eardrum vibrate each second as he listens the note?
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The eardrum is the vibrating membrane of the human ear, it works by resonance, that is, an external stimulus (force) makes it vibrate, as the eardrum is extremely light it can vibrate at the same frequency of the incident sound.
Consequently if the incident vibration is f = 256 hz, the eardrum resonates at the same frequency
f_tympanum = 256 Hz.
As a reference the response of the eardrum goes from f = 20 Hz f = 20000 Hz
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the eardrum vibrate 20000 Hz eac second
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