It's about an 8-foot-long tube of metal, it's got a hundred or so holes on top, on that side is the speaker, and here is some lab tubing, and it's connected to this tank of propane.
Es un tubo de metal de 2,4 metros de largo, con un centenar de agujeros en la parte superior; el parlante está en este lado y aquí hay un tubo de laboratorio conectado a este tanque de propano.