| 摘要 |
There are disclosed a method of and a device for reducing noises generated at an exhaust grid of an indoor unit of a separate type room air conditioner package. The device comprising speakers disposed at upper and lower sides of the exhaust grid, sensing means for sensing a noise condition at a main noise source, i,e., a duct portion, and control means for analyzing the noise condition sensed by the sensing means and emitting control noises through the speakers. <IMAGE> |
