抄録
Active noise control (ANC) system with extremely high sampling frequency such as 100kHz was proved to be effective for reducing the distance between the reference microphone and the secondary source, by using Field Programmable Gate Array (FPGA), in our previous works. However it was difficult to reduce low frequency range by the above system, because it could not realize long impulse response. In this study, by using parallel computation technique of FPGA, long impulse responses were realized and the above compact ANC system was proved to be effective for low frequency range down to 200Hz.
