Question

The
part of ear which vibrates when outside sound fall on it is
a) Tympanic membrane
b) Eustachian tube
c) Pinna
d) External ear​

Answer 1

Answer:

external ear

Explanation:

Answer 2

Hearing starts with the outer ear. When a sound is made outside the outer ear, the sound waves, or vibrations, travel down the external auditory canal and strike the eardrum (tympanic membrane). The eardrum vibrates. The vibrations are then passed to 3 tiny bones in the middle ear called the ossicles.