High speed trains of the Japanese have a worldwide reputation. But the designers who developed high-speed trains had a problem that they could not overcome until recently: noise. This problem was also encountered in the design of the high-speed trains, called the Japanese Shinkansen 500 series high-speed trains. As the speed of the train increased, parts that came into contact with the electrical wires produced a strong hum and disturbed the passengers.
Trains also caused serious noise pollution in residential areas within the city. Engineers managed to fix this problem with the high-speed trains they named Shinkansen. But not by working harder in the workshop, but by imitating the owl.
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