Etymotic Research, Inc. holds
more than 20 patents on directional microphones.
Directional microphones partially reject sounds from the sides and rear,
which is the basis of their noise-reduction ability. The best directional
microphones, such as our sD-MIC and CC-Mic, can bring the average hearing
aid wearer back to near-normal ability to understand speech in noise.
The most common complaint of hearing aid users is difficulty understanding
speech in noise. Hearing aid circuits alone can't solve the problem, but
in many cases, directional microphones can.