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This reduces noise in problem areas although trains make a distinctive tonal sound on freshly-ground track due to the pattern on the rail left by the grinding process, which wears flat over time. Rail squeal is a sound caused by a train's wheels slipping under specific conditions, usually around sharp curves.
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. [15]
It is not uncommon for the sound of a train's whistle to propagate for miles; yet vehicle operators still have a difficult time hearing the warning signal due to the vehicle's soundproofing and ambient noise within the cab (such as engine, road, radio, and conversation noises).
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 ...
Blowing over the edge of a jug or bottle can create a nearly pure tone of low frequency. The driving force is the flow over the jug edge, so one might expect an edge-tone dipole sound field. In this case, The curvature and roundness of the edge makes a strong edge tone unlikely.
resistors: the braking resistors of electric trains, used to dissipate electrical power when the catenary is not receptive during braking, can make electromagnetically induced acoustic noise; coils: in magnetic resonance imaging, "coil noise" is that part of total system noise attributed to the receiving coil, due to its non-zero temperature.
“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.
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.