How does it work? Beamforming - A powerful Digital Signal Processor (DSP), which is sort of a Central Processing Unit (CPU), calculates the sound received by all the microphones of up to a maximum of four, and reduces the area of microphone coverage to only the sound directly in front of the user. This method is called beamforming. Beamforming controls the sensitivity of the microphones to sound from different directions, so with this control it is possible to listen to only what the user wants to listen to. Noise Cancellation - In addition to beamforming, any noise that is picked up around the sound source the user is listening to is cancelled. This noise can be anything ranging from air conditioning, traffic noise or other disturbances. By using special microphones that pick up the noise signals, these noise signals are then sent to the DSP where the DSP subtracts the noise from the main sound source. The result is a much clearer sound source and higher intelligibility. Power Saving - To save battery life, EasyHear is intelligent enough to switch modes between high performance constant beamforming and power save fixed beam operation modes.