Directional Microphone Technology
The "gold" standard when it comes to reducing unwanted noise. Essentially, the hearing device has two microphones or two separate openings connected to one microphone. In simple terms, sounds collected from the rear opening of the hearing device are "subtracted" from the sound collected by the front microphone and the net result is that the wearer receives greater information from the direction that he or she is looking toward. This is an over-simplified explanation of a complex technology which has many variations and can be discussed in more detail with your practitioner.