Invisible in-the-canal (IIC) hearing aids, commonly referred to as invisible hearing aids, are the smallest of in-the-ear hearing aids. They are very discrete, almost invisible, in most people’s ears. The invisible hearing aids sit deeply in the ear canal, which makes them discrete, and able to deliver the most natural sound. When the microphone of the aid sits so deeply in the canal, and the speaker is so close to the eardrum, everything sounds more clear and closer to what normal hearing sounds like. People who wear invisible hearing aids often say that the naturalness of the sound helps them filter out background noise better compared to other hearing aid models.