There are several different types of hearing aids that provide their own benefits for each patient, with the types working slightly differently from one another due to the differences in electronics that are being used. Digital hearing aids will all work on a 3-part system in order to properly amplify incoming sound consisting of a microphone that receives the sounds and converts it to a digital signal, the amplifier taking that digital signal and increasing its strength, and the speaker producing the sound so that it can be heard at a good level depending on the needs of the patient. Hearing aids that are not classified as digital will typically be analog, which work by converting the received sound waves into electrical signals into amplified sounds so that the wearer can hear them at the correct volume for them. There is no real difference in quality for the two main types of hearing aids, the type that is chosen for each patient is entirely dependent on which is considered to be better suited to address the specific needs of the patient.