Digital audio technology is built into every device today that produces sound. Analog sound technology is largely obsolete. This has driven down costs for devices such as headphones, microphones, as well as microphones and speakers built into computers, smartphones and tablets. It has also had a huge impact on the quality and size of hearing aids and hearing aid accessories.
So chances are you are already using digital audio technology to improve your hearing in your existing devices. Sound processing capabilities in these devices are used to provide clear audio, to eliminate noise, and to clean inbound sounds of sound elements that may obscure comprehension.