Conventional hearing aids are equipped with features that allow for limited adjustments, based on your hearing needs. A conventional hearing aid has an analog circuit that cannot react to sound as quickly and precisely as the computer chip used in programmable hearing aids. 

Programmable hearing aids are a step up in technology from conventional hearing aids. These instruments have an analog circuit that can be adjusted (programmed) by your hearing healthcare professional on a computer. This allows for greater flexibility and fine-tuning of the hearing aids to the patient's needs. 

Programmable hearing instruments offer an improvement in technology and sound from conventional hearing instruments. Although programmable hearing aids can be adjusted by a computer, they do not offer the degree of flexibility or the fast processing that a digital hearing instrument has. 

Digital hearing aids boasts today's most advanced technology. Digital hearing aids are programmable hearing instruments with digital circuits. These digital circuits are more flexible than analog circuits. They can be programmed to match the patient's individual hearing loss, sometimes at each specific frequency / pitch. Digital circuits offer improved clarity of sound, less circuit noise, faster processing of sound, and improved listening in noise when compared to analog circuits.