Railway noise has several areas that can raise a challenge in terms of acoustic mitigation. Large freight trains have a couple of different noises to reduce: one is the sound of those big diesel locomotive engines; it’s loud, low, and constantly moving. The other is the track noise created by the steel wheels riding on the steel track; this is in the higher frequency range and just as intense.
This noise source is called a line source not a point source, and is more like a cylinder of noise than a sphere of noise so train noise only decreases by 3db for each doubling of distance from the source.
Modern day electric trains don’t have the loud diesel engines creating that low frequency we have all heard when a train is passing, but they do have entirely different problems; they make noise when they start moving and when they slow down pulling into the station. They create noise due to the velocity at which they travel. They also have massive fans that generate a lot of noise in front, underneath and on the top of the trains. These noises are a problem as there may be tighter constraints in and around train stations and rail lines. These areas create a lot of reflective paths for these noises. Due to the thickness of our All Weather Sound Panels (AWSP’s), it makes for an easy resolve near the tracks. Our panels can be tied to a railing or attached to an existing wall. This is all to absorb some of the more critical and annoying high frequencies from the train motor spool up as well as the track noise. AWSP’s can easily follow a twisty track along the countryside or fit in tight areas in or near inner city stations.
If you need a highly sustainable, high performance, easy to implement solution for a rail project, Acoustiblok’s “All Weather Sound Panels” are the solution. At a mere two inches thick, delivering a NRC of 1.0, and a STC of 30, these panels work incredibly well.
Please feel free to contact us directly to speak with a railway noise specialist.
To learn more about rail generated noise problems and how to deal with them, click here.