non-newtonian fluid on a speaker cone
A proper little messy experiment, the way all good science should be :) take about 2 parts cornflour to 1 part water, mix and refine till it flows smoothly like syrup when left alone, but breaks up and shears if pushed hard with a utensil. Then add to speaker cone and give it a little shove around the 50hz - 80hz region.
http://en.wikipedia.org/wiki/Non-Newt...
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