Siemens introduces smart hearing aids at the 2015 International CES
From: Siemens

At the 2015 International CES, Siemens is unveiling smart hearing aids -
their latest in wearable hearing technology. The hearing aids can be
discreetly controlled via both iPhone and Android devices, with latest models
clinically proven to outperform people with normal hearing in background
noise. When two hearing aids are worn (the most common case), Siemens’ new
smart hearing aids utilize intelligent, two-way wireless communication to
zero in on desired speech with pinpoint accuracy. This enables
better-than-normal hearing in crowded situations like noisy restaurants and
cocktail parties where background chatter has historically been a challenge.

When paired with Siemens' new easyTek and easyTek App, a wearer can control
the direction of the hearing aids' microphones - front, left, right, or
behind— to simultaneously enhance speech and suppress background noise. The
span of the microphones' focus can also be controlled via the app, allowing
wearers to select a wide range of focus or a very narrow beam.  

Read the press release at:
https://us.hearing.siemens.com/media/2015/01/siemens-hearing-2015-international-ces.pdf