There is speculation afoot that some North American diplomats in Cuba could be affected by "covert sonic devices." Could this be the science that could eventually give us the "Sonic Boomerang" from Battle of the Planets? Well, clearly not yet, since to be effective using current technology, you'd need to mount the birdrang on the back of a truck, but have a read of the article and see what you think. Oh, and happy Science Week! http://www.abc.net.au/news/2017-08-16/cuba-diplomats-being-deafened-by-covert-sonic-devices-theories/8812578

Interesting read. I had heard of something like the speakers hidden in walls idea before. It was one of the first things I thought of when I started reading the article. Super low level audio played continuously over long periods of time might also have an affect on the structure of the building though. They touch on something else relevant to G-Force/Science Ninja Team - microwaves. The frequency the bracelets use for the transformations is in the microwave range!

I actually heard of some of the possibilities of using sound as a weapon -- on Mythbusters, they touched upon this while testing to see if there's really a "brown note". It included (among other things) how the US military was developing a "sound cannon" to be used on civilians. (They said they intended to use it to break up riots, but a healthy, suspicious mind can easily think of other uses....)

Meep.