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Why have sound-wave methods not been shown to clear fog in the open atmosphere?
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weather modification
Cloud seeding can produce an extra 5 to 15% of precipitation.
While acoustical techniques for clearing fog have been investigated, they have not been shown to be effective in the open atmosphere. Although these methods can successfully manipulate fog within a controlled cloud chamber by establishing standing sound waves, there is no evidence that reasonable sound sources can produce similar results in the free atmosphere to effectively alter the characteristics of fog.1