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Several distinct sounds are created by various parts of the train, such as engines, traction motors, brakes, and the wheels rolling on the rails. Roughness and irregularities on the wheel and rail surfaces are a source of noise and vibration. Rail joints and squats on the rail cause a familiar "clickety-clack" sound as train wheels roll over them.
For all new or replacement train horns on trains capable of travelling up to 100 mph (160 km/h) a much lower minimum sound pressure level has been established – and a maximum sound level has been introduced (min 101 dB and max 106 dB). British train horns have two tones, high or low, and in some cases, a loud or soft setting.
Sounds at 120 decibels, comparable to an emergency vehicle siren, may cause discomfort to human hearing, according to the National Council on Aging.
In the United States, train horns are required to have a minimum sound level of 96 dB and a maximum sound level of 110 dB at 100 ft (30 m) in front of the train. To distinguish their sound from truck and bus air horns, train horns in the U.S. consist of groups of two to five horns (called "chimes") which have different notes, sounded together ...
But one predictable issue that always arises during the festive season, is train delays, changes and a full shut down of the entire rail network on Christmas day. Travel disruption: Why are the ...
As train whistles are inexpensive compared to other warning devices, the use of loud and distinct whistles became the preferred solution for railway operators. Steam whistles were almost always actuated with a pull cord (or sometimes a lever) that permitted proportional action, so that some form of "expression" could be put into the sound. Many ...
Traveling by train is not entirely out of fashion in the US. Today, Amtrak is the main provider of intercity rail travel; the government-owned system runs on more than 21,400 miles of track and ...
As a train passes through a tunnel, it creates compression waves in front of it. These waves coalesce into a shock wave that generates a loud boom when it reaches the tunnel exit. [6] [7] The strength of this wave is proportional to the cube of the train's speed, so the effect is much more pronounced with faster trains. [7]