How can we hear a sound

the outer ear collects the sound and is passed through the auditory canal . at the end of auditory canal is the eardrum , it vibrates as the sound waves reaches it . then the vibrations are amplified  by the striup , hammer , anvil in the middle ear . the middle ear transmits the amplified pressure variations to the inner ear. in the inner ear the pressure variations are converted into electrical signals by the cochela. these electrical signals r snt to the brain by the auditory nerve and the brain interprets them as sound. in the way we can hear the sound