Virtual sensing technique for a multi-reference and multi-error active noise control system

Xie, Rong, Shi, Chuang and Li, Huiyong (2019) Virtual sensing technique for a multi-reference and multi-error active noise control system. Ochmann, Martin, Vorländer, Michael and Fels, Janina (eds.) In Proceedings of the 23rd International Congress on Acoustics : Integrating 4th EAA Euroregio 2019 : 9-13 September 2019 In Aachen, Germany. RWTH Publications. pp. 6891-6897 . (doi:10.18154/RWTH-CONV-239232).

Record type: Conference or Workshop Item (Paper)

Abstract

This paper investigates the virtual sensing technique for a multi-reference and multi-error active noise control (ANC) system. Our previous study has validated the effectiveness of virtual sensing technique for the multi-channel feedforward ANC system with only one reference signal. In this paper, two reference signals are implemented. The numbers of control filters and auxiliary filters are doubled accordingly. A comparison is carried out between the condition when 4 physical error microphones are used to model 8 virtual error microphones and the condition when 8 physical error microphones are used to model 4 virtual error microphones. It is demonstrated that when the number of physical error microphones are not less than the number of secondary loudspeakers, the virtual sensing technique remains effective.

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