There are many special circuits to make hearing aids more comfortable. Your specialist will guide you.
ADVANCED DESIGN NON-DIGITAL
These are more complex circuits that may be "automatic" (i.e. no volume wheel necessary) but no longer used extensively.
These higher technology circuits have numerous adjustable bands of compression. They are usually automatic and use computers to program different listening environments. Some models use remote controls to provide more direct control by the user.
100% DIGITAL SIGNAL PROCESSING (DSP)
Audio sounds are digitized and then processed. These types of hearing aids use computers for the fitting process. They contain computer chips within the hearing aid for further processing.
For maximum benefit this circuit depends upon the placement of the hearing aid near the eardrum, which changes the performance of this type of hearing aid.
Your Hearing Instrument Specialist's role is to correct your hearing problem with the most effective hearing instruments for you. Listen to their advice and discuss your options.