Optimization of the FXLMS Algorithm in an Active Hearing Protector

Up to now the major part of practical implementation of ANC systems in hearing protectors has been based on analog feedback principles. Carme et al. [2] have recently presented a “hybrid” ANC hearing protector where an analog feedback control system is combined with a feed forward control system. Acoustic applications of adaptive/active noise cancelling require a secondary sound source. In this case the FXLMS algorithm is generally recommended.