A High Performance Approach to Local Active Noise Reduction in Noisy Cabins

Spacecraft cabin is noisy and uncomfortable. Sometimes, the noise level can exceed 80 dBA. There are 2 challenges to meet the above needs. One is to generate an anti-phase (180 deg out of phase) signal in real-time to reduce the loud cabin noise in a small area. Another one is to minimize the spillover of the anti-phase signal to other places. We propose a novel and high performance approach to suppressing background noise in noisy cabins. Our system utilizes a patent pending adaptive algorithm that can generate anti-phase signals in real-time to suppress background noise. Our system is portable and easy to set up. Most importantly, our system can suppress background noise in a small area and will not spill the anti-noise signal to other places.