Why are whistles so loud?

When you blow into a whistle, the jet of air becomes unstable and excites the resonant sound wave which fits into the whistle cavity. Because the whistle is open, the sound radiates out so you can hear it.Click to see full answer. Keeping this in consideration, why are train whistles so loud?The horn has to be louder than the sound of the train itself – the rumbling of the train on the tracks and the noise of its engine. It also has to overcome any ambient noise like trucks driving by on a neighboring road. A train takes x seconds to come to a stop by which point it has covered y distance.One may also ask, how loud can a human whistle? It can be EXTREMELY loud, over 130 db (decibels), the commonly referred to “threshold of pain”. Prolonged exposure can damage your hearing and the hearing of those around you. Herein, can a whistle damage hearing? Whistle blowing can damage hearing. Frequent exposure to whistle blowing could lead to hearing loss. A single whistle blow ranges from 104 to 116 decibels and can severely harm hearing, according to research carried out by Professor Greg Flamme at the Western Michigan University.What does 3 whistles mean?Three blasts of the whistle is an international distress call, which is loosely translated to “Help me!” Two blasts of the whistle is a call-back signal which means “Come here.” One blast can mean “Where are you?” or it can be a call-back signal if you hear anything that sounds like a code.

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