[mkirkpatrick]

Originally Posted by Einstein mkirkpatrick For a one foot diameter tornado in the lab, the sound frequency would be 1087Hz. Two synchronized sound emitters positioned orthogonal to each other are aimed at a central location. One of the emitters will have to be moved 1/4 wavelength toward or away from the central location to control the rotational direction. The interference pattern of the two waves will produce the rotating sound wave. But I never tried this out. Since sound waves are longitudinal, the rotating wave should push the air in a circle. Based on my theoretical understanding of wave phenomena, I believe this should work.

I believe you are right Einstein,however a testing is most unlikely.




regards michael.