An Adaptive Noise Cancellation Device For First Responders
Time is extremely important and can mean the difference between life and death for a first responder. In a noisy environment the quality of the transmitted voice signal can make this difference. The purpose of our system is to significantly reduce the background noise in these environments while still transmitting the voice of the first responder.
The device uses two microphones, one that picks up the human voice and the background noise. The second microphone picks up only the correlated background noise. An adaptive filter then minimizes the background noise or maximizes the desired signal (voice) without prior knowledge of either the signal or the noise.