Directional microphone technology is a method of improving speech intelligibility in background noise. UltraZoom is the new adaptive multi-channel beamforming technology, automatically available in SoundFlow or in a manual program. This adaptive beamformer is ideally suited for older children who move from one noisy environment to the next. Sophisticated microphone matching and calibration in UltraZoom ensures optimal long-term performance of the dual-microphone technology.