What I was refering to was resonance...
and like you guys say it can be used as a weapon..I believe even the Bibles story of Jericho falling was actually a sound machine that vibrated the walls so badly that it collapsed.Of course the Bibles version is that they all walked past and blew their rams horns .. Maybe if they were able to amplify this sound, It could cause a whole lot of damage .To anything that can hold resonance...( not even sure I'm spelling that right?
"Following God's instructions, they marched around the city once a day for seven days, then on the seventh day they marched around it seven times. Then they blew on their trumpets and made a big noise and God caused the walls of Jericho to fall down."
quote from bible is pulled from ask.com
Read more: http://wiki.answers.com/Q/What_is_the_s ... z2C8gCfwRk
I think that space video is pretty cool