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And he found out that indeed, there was 19 Hertz at a pretty substantial amplitude.This is his actual tracing of what he recorded in that lab, starting at five, ten, fifteen, twenty Hertz. You can see that giant peak just at about 19 Hertz. He measured the roomand found out that the room was exactly half the length of a 19 Hertz wavelength, which is some 30, 33, 30 -something feet, I believe. And the lab was half of that.
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