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Rail squeal is a sound caused by a train's wheels slipping under specific conditions, usually around sharp curves. [4] Air displacement of a train in a tunnel can create noise from turbulence. Trains also use horns, whistles, bells, and other noise-making devices for both communications and warnings.
A torpedo is a device which is strapped to the top of a rail. When a train drives over the torpedo, it emits a very loud "bang" which can be heard over the noise of the engine, and signals the engineer to stop immediately. Torpedoes are generally placed by the flagman when protecting a train ahead.
However, train drivers are obligated to sound their horns at all times, which may lead to noise complaints. Transport Canada allows municipalities to pass bylaws that prohibit train horn sounding at train stations and level crossings, as long as Transport Canada grants approval to that municipality.
When a train has made a full brake application due to adverse event, or has lost its train air due to a defective valve (a "kicker"), or a broken air line or train separation. The train crew will normally declare that they are "in emergency" over the train radio, thus warning other trains and the dispatcher that there is a problem.
For years, Columbia leaders have weighed spending millions on a project to create “quiet zones” that would silence train horns that echo daily throughout the city — white noise to some, but ...
“If I lived next to the railroad tracks and I had to deal with that, I don’t know if I could,” the mayor said.
Train whistles are used as a safety warning and also by the engineer to communicate to other railroad workers. See train whistle for a description of the whistle code used to communicate. Also a nickname for an air horn on a diesel locomotive. Steam engine whistles were historically known as chimes in the US during the 19th century. Whistle bell
Residents worry for their quality of life, and they don’t trust a study that suggests the new railroads and train traffic won’t cause any increase in noise.