A non-uniform subband implementation of an active noise control system for snoring reduction

The snoring noise can be extremely annoying and can negatively affect people’s social lives. To reduce this problem, active noise control (ANC) systems can be adopted for snoring cancellation. Recently, adaptive subband systems have been developed to improve the convergence rate and reduce the computational complexity of the ANC algorithm. Several structures have been proposed with different approaches. This paper proposes a non-uniform subband adaptive filtering (SAF) structure to improve a feedforward active noise control algorithm. The non-uniform band distribution allows for a higher frequency resolution of the lower frequencies, where the snoring noise is most concentrated. Several experiments have been carried out to evaluate the proposed system in comparison with a reference ANC system which uses a uniform approach.