Active noise control for headrests

This paper presents the active noise control (ANC) systems for creating quiet zone to cover the users' ears in headrests. The two-input two-output (TITO) ANC headrest system based on the multiple-channel adaptive feedback filtered-x least mean square (FXLMS) algorithm is proposed. In order to reduce system cost of the TITO ANC headrest system, the combined-input combined-output (CICO) ANC headrest system based on the single-channel adaptive feedback FXLMS algorithm is developed. The performance of the proposed ANC headrest systems are evaluated using the experimental setups. The real-time experiment results show that the CICO ANC headrest system achieves the satisfactory performance.