What is the difference between digital hearing aids and other types?

Hearing aids are described as analog or digital, depending on the technology they use to process sound. Analog hearing aids relied chiefly on amplification of ambient sound, which by itself does not necessarily bring clarity where sound volume is not the main problem. Digital technology affords many enhancements such as the ability to truly individualize settings, filter extraneous background noise, and operate successfully in the tiniest components.