Check out this video

https://www.youtube.com/watch?x-yt-cl=85027636&v=w-Y6N36mvKA&x-yt-ts=1422503916
Siemens We continue to raise the standard of Soundability™, drawing inspiration from the healthy auditory system. For example, binaural hearing: It enhances sounds’ loudness, clarity, richness and quality. But binaural processes deteriorate with age and hearing loss.
A well-fit pair of modern hearing aids is a good start towards restoring binaural hearing. But in challenging listening situations, hearing aids have not been able to compensate for the loss of binaural processes, despite giving input to both ears. Siemens has solved this problem. We link our hearing instruments to provide binaural features whenever needed: With binax, the next generation of BestSound™ Technology.
binax simulates the effects of binaural hearing. It is so powerful that it is the world’s first technology that enables wearers to understand speech in demanding environments even better than people with normal hearing.*
*Two clinical studies have shown that binax provides better than normal hearing in certain demanding environments (University of Northern Colorado, 2014; Oldenburg Hörzentrum, 2013): Speech Reception Thresholds (SRT) in cocktail-party situations improved up to 2.9 dB for wearers with mild to moderate hearing loss using Carat binax or Pure binax hearing aids with narrow directionality, compared to people with normal hearing.