Conventional Analog hearing aids generally amplify all levels of incoming sounds equally. Programming is done manually and is limited to bass and treble adjustments.
While programmable analog hearing aids contain analog circuitry, they do allow for more advanced programming and fine-tuning then conventional analog aids. Sound tends to be smoother and more comfortable, especially in noisy situations.
Digital hearing aids are the most versatile and technologically advanced instruments available. Via sophisticated computer programs digital hearing aids can be tuned to the individual's specific hearing loss and preferences. Program settings can be adjusted at any time to accommodate changes in the users hearing.