Hearing

Question 1

How do humans hear?

Answer 1

1. The Pinna collects the sound
2. The sound travels through the ear canal
3. The ear drum vibrates and passes the sound
4. The middle ear amplifies the sound
5. The sound is then transformed into electrical impulses

Question 2

What are the causes of hearing loss

Answer 2

Ear canal blocked
Middle ear is filled with fluid
Ear drum has been ruptured by noise or infections
Sensory cells damaged by loud noises
Defect in auditory nerve
Defect in the tiny hair sensors in the cochlea

Question 3

What is the sonar calculation

Answer 3

Total time/2 times speed of sound