New digital hearing aids are a huge improvement on previous devices that were larger and had poorer sound quality. Older devices lacked sound quality adjustments and had no way to avoid amplification in unnecessary areas. They used to whistle and the wearer couldn't prevent it. Despite these disadvantages, many people were satisfied with the old hearing aids. However, new digital hearing aids offer greater sound quality and can address some of the cosmetic, social stigma, and upkeep concerns.