What Is the Most Soothing Sound?

Transcript

A train horn is a warning and signaling device  that produces a loud sound to alert people of the train’s movement. Train horns work by feeding  air from the train’s air supply. 125 to 140 pounds per square inch of compressed air enters through  a line to the manifold, which leads to each chime, this air then enters the power chamber, causing  meta... Read More