Acme high pitch triple tone train whistle with bulbIntroducing the Acme high pitch triple tone train whistle with bulb The Acme train whistle has 3 pipes which have been tuned and polished by hand. It produces a tri tone dissonant chord just like the whistle on an old American steam train. Each low pitch is generated by a metal organ pipe with a durable plastic mouthpiece. Also known as the Locomotive Whistle which originated, so the story goes, on the Leicester and Swannington Railway line, this