Feed-forward active noise barrier
A passive sound barrier and sound barrier technology, applied in the direction of sound-producing equipment, instruments, etc., can solve the problems of no relevant research on the application of active sound barrier, affecting the control effect, and limited control effect, etc., to achieve easy implementation, good control effect, high cost effect
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[0018] The present invention is described in detail below by examples.
[0019] Such as figure 1 , figure 2 As shown, the feedforward active sound barrier includes a passive sound barrier 1 and a single-channel feedforward active control system array 2 , and the array is composed of multiple single-channel feedforward active control systems 3 . Each single-channel feedforward active control system 3 is composed of a reference microphone 6 , an error microphone 7 , a secondary sound source 8 and a single-channel controller 9 . In this embodiment, the reference microphone 6 and the error microphone 7 are electret microphones, and the secondary sound source 8 is a loudspeaker.
[0020] The single-channel feedforward active control system array 2 is installed on the top of the passive sound barrier 1. In this embodiment, at a height of h b A horizontal support 5 is installed on the top of the passive sound barrier body 4, and secondary sound sources 8 are evenly distributed an...
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