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Loud noises can give you a headache, but scientists think its the sounds we cant even hear that are making us sick. Whats infrasound? The Coolest Things...
Modulating Carrier Waves with Amplitude and Frequency, plus the relationship between Wavelength, Frequency and the speed of light. All that and more, this time ...
Cold laser has super pulsed penetration, red light, and infared light. The laser penetrates 2 inches deep to get to the middle of the knee and shoulder etc so t...