The OSPA hearing aid is highly proficient at improving sound quality and uses as much of the functioning ear as possible. It is not designed to be hidden from sight, in fact with its streamlined, elegant, magnesium frame it looks more like a fashion accessory than a hearing aid. However there is function within that frame, OSPA uses lasers and optics to read mechanical vibrations and has the potential to provide well-balanced, natural and high resolution sound. Unlike other hearing aids which use a microphone and speaker to amplify sound, OSPA uses the external and middle parts of the ear to enhance the signal sent to the inner ear.
Read the full article: OSPA: high-fidelity hearing aid design from think/thing