I just tested the calliope I made from your black train horn kit by locking it up in a building with all doors and windows shut. It is an absolute crotchslammer! In Delaware, it is, unfortunately legal to play loud and obnoxious music before 11 PM. I live out in the country in an attempt to get away from having to hear urban music which metastasizes out into the countryside and into our homes. I had a problem with neighbors with their MTV hip hop music contaminating my environment but not anymore. Because loud music is legal and the police and courts refuse to stop it, I retaliate against their disco drums by playing my musical compositions over the calliope that I made and my music is louder than the freight train horns of the railroad nearly half a mile away. These horns will probably never have to be used again after their first use because, like an arsenal of hydrogen bombs during the Cold War, the neighbors understanding that I have them and that I will use them any time I hear their music is a splendid deterrence. Check out the ending of the DVD I sent you of my wife - whose acting skills are so vastly superior to mine - doing a merciless imitation of a low class neighbor being caused to suffer an emunctory vicissitude in her galligaskins upon being surprised by the horns. Barney Vincelette