

Today, hearing aids work with the help of two basic types of technology:
* Hearing aids with digital technology contain a very advanced degree of signal processing that can provide better accuracy, sound quality, perception of loudness and environmental noise reduction. Digital hearing aids can have many separate amplifier channels. Most digital models are programmed using computers and can offer a high degree of flexibility and precision.
* Analog hearing aids contain more basic technology with less flexibility and precision. But some are more advanced programmable models and remain effective in improving hearing and providing good sound quality at an affordable level comfortable for many patients.