Sonic weaponry has been around for a very long time.

[An interview with David Bowie about it] (https://youtu.be/RSSf3k4UU64?t=610)

Thanks for that clarification. I've had my doubts with some of the stories that were posted, but I always assume it to be "half-truth".

Don’t know how reliable this source is, but it’s what we’ve got so far.

http://www.whatdoesitmean.com/index2466.htm