Seeing this, I can't help but be reminded of http://web.mit.edu/2.009/www/experiments/steamCannon/ArchimedesSteamCannon.html
Apparently, this kind of weapon is a little more realistic than we probably thought. Go to Comment
A large forest which is the site of a research monastery dedicated to Silence. In the course of developing new spells, the monks frequently deaden all sound in huge areas of the forest, an extremely eerie experience for anyone passing through.