ReSound developed the mic-in-helix (MIH) style of hearing aid several years ago, and remain the only manufacturer of this product. The MIH style was designed to provide the most natural sound quality. It does this by using the ears natural shape to collect sound in the most efficient way.
Through uniquely positioning the microphone in the helix, ReSound has been able to attain the following advantages:
- By moving the microphone outside of the hearing aid, the devices can be built smaller
- The microphone position reduces the risk of feedback
- Both of the above allow for larger air vents, offering a more natural sound
- It greatly reduces the prevalence of wind noise which can affect other custom products