SynthHD Pro from Windfreak Technologies is a dual-channel RF signal generator and frequency sweeper that is software-tunable from 54 MHz to 13.6 GHz in 0.1-Hz steps. Each of the instrument’s channels ...

Computers could be trained using artificial explosion signals, to help them better detect distant nuclear detonations, chemical blasts and volcano eruptions. Infrasound is at a frequency too low to be ...

What kind of clever things could you do with a signal that had a period of 2 hours? Or 20? Any ideas? No seriously, tell us. Because [Joseph Eoff] has come up with a way to produce incredibly low ...