This is generally the least expensive type of circuitry. This circuitry can accommodate more than one program so that your child can change the program to receive better sound across different listening conditions. Digital hearing aids use a computer chip and, as a result, offer the most flexibility to your audiologist in making adjustments. Digital hearing aids also offer a number of settings that allow the user to manipulate the amplification of incoming sound in specific frequencies where it's difficult to hear.
Digital circuitry is the most expensive of the above options.
Most of the time, two hearing aids are recommended for your child. Research studies on adults have shown that those people who have a hearing loss in both ears, but habitually wear only one aid, lose the ability to recognize speech in the other ear. Once the ability to recognize speech has been lost, it cannot be restored. If your child has a hearing loss in both ears, using two hearing aids prevents auditory deprivation and helps your child to localize sound and to hear better even in noise. Hearing aids are expensive, so you will want to understand exactly your audiologist's terms of purchase .