Active control on the scattered radiation by a rigid surface

An approach for predicting the scattered sound pressure in one- and three-dimensional sound field is proposed by measuring the total sound pressure on a rigid scatterer surface, which is further used as an error sensing strategy in an active noise control (ANC) system to reduce the scattered radiation. Experiments are carried out to validate the prediction method, and a single channel broadband feedforward ANC system is implemented to suppress the impulsive scatterance at the observation point. It is found that the ANC system based on the proposed prediction method is effective. About 12.2 dB reduction of the impulsive scattered radiation is obtained in one-dimensional sound field, and 8.2 dB reduction in three-dimensional sound field. ACKNOWLEDGMENTS The authors would like to acknowledge the support NSFC (Project 11104141 ).