I recall seeing ads for these "wonder weapons" in the back of Popular Mechanics as a boy. Hypnotizer units! Pain fields! Brain death rays! Snoopy Sno Cone Makers! Well, the company that sells plans for these unique death-dealing devices, Information Unlimited, is online and ready to rumble.
They only sell blueprints, so you'll have to make your own Sonic Nausea Inducer from parts you find around the house, provided your house is a munitions dump.
Wonder Weapons, $20 a Pop [DefenseTech via BoingBoing]