Question

a)Name three bones in our middle ear , which help in amplifications of the vibrations of sound

b)Give the audible range of human ear

c)Draw and label neatly the diagram of human ear


[ class 9 cbse ]

Answer 1

The three bones in our middle ear are
Hammer, anvil and stirrup.

The audible range of human ear is 20 Hz to 20000 Hz

HOPE it helps u

Answer 2

I am writing what I know Sry if I am wrong...
a) The middle ear has three interconnected bones - Incus, Malleus and stapes which helps in amplifications of the vibrations of sound.
b) The audible range of human ear :
20 Hz to 20,000 Hz
c) I have attached the diagram.
Ear :
It is the organ that helps us to hear. We can classify it's main parts as outer ear, middle ear and the inner ear. The pinna collects the sound and sends it to the middle ear which is then amplified and transfered into the inner ear after which it reaches the brain being converted into nerve impulses.
Hope this helps! ^_^