TEG Teslafanatic Moderator Aug 20, 2006 22,105 9,506 Sep 23, 2012 #1 Sep 23, 2012 #1 Saw this today: (There is a speaker inside the tube.) Also, saw this online: (I guess the above is a small jet engine?!)
Saw this today: (There is a speaker inside the tube.) Also, saw this online: (I guess the above is a small jet engine?!)