Multi-channel hybrid active noise control system for infant incubators

This paper presents a new active noise control system for infant incubators in neonatal intensive care units. To overcome the problem of complexity of noise sources and their locations, a multi-channel hybrid ANC system using the filtered-x least mean square (FXLMS) algorithm was developed. This hybrid ANC system integrates both the feedforward and the feedback ANC systems to cancel noises from both inside and outside the incubator. Computer simulations and real-time experiments were performed to compare the proposed hybrid ANC algorithm with the existing feedforward ANC algorithms under various complex noise environments.