Robust parallel virtual sensing method for feedback active noise control in a headrest

Robust feedback controller combined with the remote microphone method for broadband active noise control in headrest

Adaptive parallel filter method for active cancellation of road noise inside vehicles

Multichannel two-gradient direction filtered reference least mean square algorithm for output-constrained multichannel active noise control

This paper presents the development of a dynamic Active Noise Control (ANC) algorithm aimed towards reducing the broadband noise inside the helmet earcups of a fighter aircraft pilot helmet. The dynamic ANC involves a Variable Step-Size Griffiths (VSSG) FxLMS algorithm to attenuate noise entering directly through helmet, a LMS based adaptive noise canceller to attenuate noise entering through the pilot microphone, and energy detectors for failure protection and optimized battery power usage. The algorithms are implemented on Texas Instruments’ TMS320C6748 processor and are tested in a helmet ANC experimental setup. 

Chia-Hao Lin

Papers

Multi-functional active noise control system on headrest of airplane seat