A digital hearing aid is a hearing aid device that receives sound and digitizes it (breaks sound waves up into very small, discrete units) prior to amplification. A digital hearing aid uses a microphone, but a microprocessor performs most of the device's functions digitally. Because the signal is represented as a series of numbers, it can be quickly and accurately altered.

Advantages:

* Convert sound to digital signals.
* Programmable and Non Programmable both types are available .
* A digital hearing aid can be programmed to adjust itself to the current environment millions of times each second
* Can distinguish between noise and speech. Can suppress background noise so a person can hear speech better.
* The most sophisticated digital hearing aids have built in intelligence that allows them to discern between soft, but desirable sounds, and louder, but unwanted noise.

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