Digital Circuit- Signals from a digital sound processor are cleaner and less distorted than the internal amplifier noise common in analog circuits.

Compression- A type of automatic gain control that produces reduced output levels for given changes in adjustment possibilities.

Screw set- Adjusted by a screw driver- limited adjustment possibilities.

Programmable- Acoustic parameters of hearing aid are adjusted by computer virtually a limitless number of programming possibilities.

Single Channel- Amplifies patient specific ranges of sound

Multi Channel- Enables the programmer to separate the audiogram into several distinct frequency groups to more exactly mirror the hearing loss for clearer understanding.

Noise Suppression Circuit- Makes hearing aids sound less noisy but does not enhance speech understanding in noise.

Bands- Frequency range in which you can control gain, noise reduction, and feedback cancellation.

Multi-Memory- Provides different programs for various listening situations. Basically it is an electronic tone control.

Directional Microphone- Designed to enhance signal to noise ratio by de-emphasizing inputs arriving from the sides and behind a listener. Decreases sound coming from the rear by 30-50%.

Telecoil- An internal antenna which picks up the magnetic field of a telephone.

Open Fit- Provides a more natural sound reproduction due to the ear not being plugged up.

Feedback- Is a high pitch whistle or howl, which is caused by the recirculation of acoustic output of any amplifying system.

Zinc Air- The only type battery used for hearing aids- the average digital hearing aid uses 30-35 batteries per year.