Noise emissions

Active for ‘quiet’ rails

Noise development is not an issue of relevance to Vossloh itself regarding sustainability; the Company meets all the statutory emission regulations. The products and services of Vossloh, however, serve the purposes of creating and maintaining rail infrastructure. For rail routes of all types, noise protection is a key subject of public perception, and currently counts among the most pressing challenges of rail transport. Noise hampers the urgently needed expansion of routes, causes sickness among people living near rail routes and results in high costs for the transport operators and consumers. An essential factor in effective noise reduction is combating it at the source, by optimizing the wheel-rail contact on the track. Reducing the noise caused by rail traffic and improving track acoustics have been a focus of Vossloh’s research and development work for years. The Company offers suitable products and services in all core business areas.

At InnoTrans, the leading international trade fair for transport technology, in September 2018 in Berlin, Vossloh presented numerous examples of how rail noise can be reduced in a sustainable manner in the subject area of “Silent & Clean Environment”. Special materials such as cellentic intermediate layers and plates for Vossloh‘s highly elastic rail fastening systems dampen vibrations due to rail and wheel irregularities and minimize structure-borne noise caused by rail vibrations during train crossings. cellentic components can be installed for virtually every track type. Roughly 29 million units have been installed to date. The new DFF 336 Crossover rail fastening system, which contains a high proportion of plastic, was designed with vibration dampening in mind from the very beginning and was developed particularly for the renovation of existing routes. When trains pass through switches, the wheels cause noise in the switch frog when they first come into contact with switch tongue or wing rails. Vossloh‘s special switch designs reduce this noise by optimizing the movement of the wheel over the rail in the transitional area. Vossloh‘s crossings with movable frog points are made from a cast manganese steel developed in-house. The more ripples, slip waves and skid spots rails have, the louder the rolling noise is when a train crosses. Vossloh offers different processing technologies (grinding, milling) that vary according to the severity of the rail defects and that can be used to restore the rail surface to a smooth and thus “quiet” condition. The rail and switch processing machinery can achieve noise reduction of up to 10 dB(A) by precisely removing material. The machines themselves also operate quietly. The new Multi Purpose Milling (MPM) compact milling machine, for example, generates noise measuring less than 78 dB(A) during operation, so that residents are not disturbed even during a night shift. For comparison, on a quiet residential street, the noise level is roughly 40 dB(A); a car going 50 km/h reaches a volume of 70 dB(A).

You can find more examples of Vossloh’s product and service portfolio here .