要在千米以上人感觉会好些，当然风扇越多应离居民越远。-世界军事论坛-军事论坛-世界论坛网（电脑版）

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要在千米以上人感觉会好些，当然风扇越多应离居民越远。

送交者: dds 2015月06月07日07:13:07 于 [世界军事论坛] 发送悄悄话

回答: 可以装在没填的礁盘上，距离岛有个几百千来米会好很多由 eastwest 于 2015-06-07 06:47:05

How Loud Is A Wind Turbine? Because wind turbines are such a great source of clean, renewable energy, they’re usually greeted with a great deal of enthusiasm. But some complaints have been made that they can cause too much noise for residents living within a mile of the blades. So just how noisy are these turbines? The closest that a wind turbine is typically placed to a home is 300 meters or more. At that distance, a turbine will have a sound pressure level of 43 decibels. To put that in context, the average air conditioner can reach 50 decibels of noise, and most refrigerators run at around 40 decibels. At 500 meters (0.3 miles) away, that sound pressure level drops to 38 decibels. In most places, according to Keith Longtin of GE Renewable Energy, background noise ranges from 40 to 45 decibels, meaning that a turbine’s noise would be lost amongst it. For the stillest, most rural areas, Longtin says the background noise is 30 decibels. At that level, a turbine located about a mile away wouldn’t be heard. For a complete run down of louder-than-a-fridge but quieter-than-a-blender context points, check out the graphic above.

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俺曾站在风机底下，离塔身大概20-30米。仰望风机转动，但并 - 老粗 06/07/15 (528)

　　　　

噪音高低根据叶片大小，叶片大的有40多米长。 /无内容 - dds 06/07/15 (123)

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