Aashirvad-Hear…
A: A hearing aid has a microphone which picks up a sound after which it is subjected to filters before being passed on to the amplifier that delivers them to receiver. This is due to the fact that the sound is clean and amplified into the ear canal. The sound must travel further to the ear canal, vibrate the ear drum that ultimately travels through the bones of the middle ear to the inner ear (cochlea). The hair cells are located in the inner ear and they help in conveying the sound to the nerve.