| 摘要 |
PROBLEM TO BE SOLVED: To provide a noise countermeasure system for wind power generation capable of reducing low frequency noise, with respect to the low frequency noise generated by a wind turbine generator system.SOLUTION: A sound collector 11 and a speaker 15 are disposed on a place separating from a wind turbine generator system 25 by a prescribed distance, a low frequency signal from the wind turbine generator system 25 is detected by the sound collector 11, converted into a reverse phase in a signal processing device 18, and synchronized with a low frequency signal from the wind turbine generator system 25 detected by the sound collector 11, and then a control signal obtained by amplifying an output is emitted toward the wind turbine generator system 25 from the speaker 15. Thus the low frequency signal from the wind turbine generator system 25 is attenuated by the control signal emitted from the speaker 15 at an installation place of the speaker 15, and influence of the low frequency noise in a resident area 10 can be prevented. |
