| 摘要 |
PROBLEM TO BE SOLVED: To provide an active silencer which satisfactorily maintains an adaptive control performance of a control processing part.SOLUTION: A first microphone collects a control target sound and generates it as a reference signal. A second microphone collects the control target sound, first and second control sounds and generates a signal corresponding to a pressure of a synthesized sound produced by synthesizing them as a post-control signal. First and second speaker output first and second control sounds respectively. A first control processing part generates, on the basis of the reference signal, a first command signal which is a signal to command the first control sound. A second control processing part generates, on the basis of the reference signal, a second command signal which is a signal to command the second control sound. A first update processing part updates and adjusts characteristics of the first control processing part by promoting the first control processing part so that the post-control signal is maintained small from moment to moment. The second update processing part updates and adjusts characteristics of the second control processing part by promoting the second control processing part so that the post-control signal is maintained small from moment to moment. |
