An effective natural communication interface requires clear, noise free audio input. By insuring highly intelligle, low noise audio source input (spoken words), Andrea Electronics' digital microphone products and technologies enable more accurate and reliable communication as high performance speech recognition is noisy office environments. In the past, the only way to obtain a clear voice signal that provided the optimal level of communication and acceptable level of speech recogniton performance was to wear a headset microphone. By wearing a headset, the microphone is at close proximity to the speaker's mouth, thereby forcing the voice to be the primary signal. Andrea products and technologies enable a person speaking to be at a distance from the audio input source, freeing the speaker from having to hold or wear a conventional "close talking" microphone while maintaining the same level of performance.