Question

The sound waves, collected by the pinna are changed as vibrations

Answer 1

Answer:

because pinna receives the sound waves and pass to auditory canal which r changed as vibration

Answer 2

Answer:

1) The pinna, collects the sound.

2) The sound wave then travels through the auditory canal which funnels the sound to the ear drum causing it to vibrate.

3) The ear drum then amplifies the sound by vibration of bones. It is in the middle ear where sound energy is converted into mechanical energy.

4) The cochlea in the inner ear converts the vibrations into electrical impulses before sending signals to the brain.

5) The brain then interprets the impulses sound.

hope it helps you...