Each hearing aid has at least one microphone, an amplifier, a receiver and a hearing aid battery (which is either replaced or rechargeable). In digital hearing aids, the amplifier acts as a computerised brain. It processes speech and audio picked up by the microphone and sends it to the receiver and into your ears, rather than simply making sounds louder like the traditional analogue hearing aids. A digital hearing aid amplifier instead, acts smartly to bring the many sophisticated layers of natural sound to life, to suit different settings, putting you in control so you enjoy them in your own personalised, individual and comfortable way.