By studying the electrical and nervous systems of the human body and the effect of sonic vibrations on them practically anything can be cured just by listening to Top of the Pops. This device uses sound waves to aid the healing of bone fractures.
Bone responds to stress by producing more cells and laying down even more bone.
In the same way that the theremin uses two oscillating frequencies to produce an audible tone, there has long been suggestion that this same theory might be applied to non-lethal weapons. Scientists in the USA are known to be experimenting with acoustic heterodyning to produce a non-lethal weapon of tremendous precision. The theory is that if two sound waves are aimed to cincide within an individuals body, the resulting vibrations would cause extreme discomfort and even vomiting, yet leave the target with no permanent injuries. The suggestion is that this device would replace the water cannon in cases of urban unrest.