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.