So when the train is coming toward you... you hear a high-pitched whistle... and as the train recedes into the distance away from you... you hear the pitch ofthe whistle get lower and lower in frequency.
Kad se vlak približava prema vama, čujete visok zvižduk, i kako vlak odstupa u daljinu daleko od vas, čujete ton zvižduka kako se smanjuje u frekvenciji.