Digital hearing aids convert sound waves into a desired response based on your degree of hearing impairment. It is able to automatically adjust the incoming sound making soft sounds louder and loud sounds softer. This allows you to remain comfortable with the response of your hearing aid without even using a volume control. The digital response also includes information about a sound’s pitch allowing the aid to be custom-programmed to amplify certain sound frequencies more than others. Digital circuitry allows more flexibility in adjusting the aid to a user’s unique hearing loss and to certain listening environments.