Till about 5 years back a hearing aid was a simple amplifier. The amplification was not related to the type and extent of your hearing loss. The user had to put up with a lot of disadvantages like jarring sounds, distortion, background noise, large size and a host of other problems.

Since then hearing rehabilitation has advanced by leaps and bounds. With the advancements in electronics hearing aids have become tinier and tinier with multiple programmable features to suit individual needs.