首页>
外国专利>
NOISE REDUCTION DEVICE, AIRCRAFT, POWER GENERATION DEVICE, NOISE REDUCTION METHOD AND NOISE REDUCTION PROGRAM
NOISE REDUCTION DEVICE, AIRCRAFT, POWER GENERATION DEVICE, NOISE REDUCTION METHOD AND NOISE REDUCTION PROGRAM
展开▼
机译:降噪装置,飞机,发电装置,降噪方法和降噪程序
展开▼
页面导航
摘要
著录项
相似文献
摘要
To improve the control effect of active muffling control for rotor blade tip noise.SOLUTION: The noise reduction device according to the present embodiment includes speakers, microphones, and a control signal generator. The speakers are disposed around the rotor and emit control sounds on the basis of control signals. Microphones are disposed around the rotor and collects the control sounds and noise emitted from the rotor and converts them into microphone signals. The control signal generation unit generates the control signals for reducing an acoustic power at positions of the microphones on the basis of the microphone signals, a rotational speed of the rotary blade, and phases of the noise arriving at the microphones from the rotary blade.SELECTED DRAWING: Figure 1
展开▼