A special trackwork assembly including a special trackwork body formed to support wheels of a train moving over a running surface portion of an exterior surface of the special trackwork body that generate traffic-related vibrations of the special trackwork body having one or more frequencies of interest. The special trackwork assembly also includes one or more tuned mass dampers secured to the special trackwork body and formed to vibrate, in response to the traffic-related vibrations of the special trackwork body, at the frequency of interest, to at least partially dampen the traffic-related vibrations of the special trackwork body.

Disclosed herein is an damping structure including a vibration energy damping member absorbing, from a vibration energy path member, at least part of noise vibration energy transmitted through the vibration energy path member, wherein a length of the vibration energy damping member is equal to or more than a half of a wavelength of the vibration of the vibration energy path member, and at least one attachment part attaching the vibration energy damping member to the vibration energy path member is disposed in a position corresponding to an antinode of the vibration of the vibration energy path member.

The present invention provides an adaptive vibration isolator. The adaptive vibration isolator includes a hydraulic system, a first elastic member, a second elastic member, an upper top plate, and a vibration energy consumption device. The hydraulic system comprises a hydraulic cylinder, a piston and a piston rod, a first though hole is formed on the piston, and the first hydraulic chamber is communicated with the second hydraulic chamber via the first through hole. An upper top plate passes through the piston rod and the piston from the transmission portion and is connected to the vibration energy consumption device to drive the vibration energy consumption device to move relative to the piston and adjust the effective aperture of the first through hole.

The present invention provides an adaptive vibration isolator. The adaptive vibration isolator includes a hydraulic system, a first elastic member, a second elastic member, an upper top plate, and a vibration energy consumption device. The hydraulic system comprises a hydraulic cylinder, a piston and a piston rod, a first though hole is formed on the piston, and the first hydraulic chamber is communicated with the second hydraulic chamber via the first through hole. An upper top plate passes through the piston rod and the piston from the transmission portion and is connected to the vibration energy consumption device to drive the vibration energy consumption device to move relative to the piston and adjust the effective aperture of the first through hole.

An acoustic sound absorptive panel or block is provided that is made from a plurality of materials and volumes selected such that each discrete volume of material has a sufficiently different sound absorption profile, resulting in a system that provides better overall sound absorption of traffic noise from motorways and railways in a practical and cost-efficient manner.

Disclosed herein is an damping structure including a vibration energy damping member absorbing, from a vibration energy path member, at least part of noise vibration energy transmitted through the vibration energy path member, wherein a length of the vibration energy damping member is equal to or more than a half of a wavelength of the vibration of the vibration energy path member, and at least one attachment part attaching the vibration energy damping member to the vibration energy path member is disposed in a position corresponding to an antinode of the vibration of the vibration energy path member.

A railway or tramway track with noise and vibration reduction elements arranged both inside and outside the track. Noise and vibration reduction elements contain at least one non-humic layer, which absorbs water, reduces its rate of flow and outflow and allows its evaporation, whereby their surfaces are composed of natural or artificial lawn or by some other suitable vegetation.

The present invention concerns a gabion (1) comprising: a cage (10) basically box-shaped, made up of a bottom (11), two frontal walls (12, 13) and two side walls (14, 15). That bottom, frontal and side walls are all formed from meshes respectively (11.1, 12.1, 13.1, 14.1, 15.1) that are fixed to each other; two compartmenting partitions (20, 30), that each connect the side walls to one other within the interior of the cage so that the internal volume (V10) of the cage is divided into: two frontal compartments (C1, C2) that are each filled with a filler material (70) made up of aggregate that cannot pass through the respective meshes of the bottom, the frontal or the side walls, nor through the compartmenting partitions in such a way that it is retained within those frontal compartments, and an intermediate compartment (C3), bounded by the compartmenting partitions and which is able to receive a granular acoustic insulation material (2); and at least one lifting partition (50, 60), that fixedly connects the frontal walls (12, 13) to each other within the cage extending through each of the frontal compartments and the intermediate compartment, which, opposite the bottom (11), is provided with at least one grab handle (51, 61), and which, for the part that is set out in the intermediate compartment, is suited to allowing the acoustic insulation material granules (2) to pass through it in such a way that the acoustic insulation material may spread freely, within the intermediate compartment, on either side of the lifting partition.

Lateral fishplate (21) for isolating a railway rail, notably a buried rail, the upper face of which includes a protective strip (26).

A system for actively attenuating acoustic vibrations of a rail for rail traffic is provided including at least one sensor for detecting at least a vertical acoustic vibration of the rail, at least one actuator for exciting at least a vertical counter-vibration of the rail and at least one control unit communicatively connected to the at least one sensor and the at least one actuator for controlling the at least one actuator depending on the vibration detected by the sensor, the counter-vibration being adapted to destructively interfere with the detected vibration, and the at least one actuator being mechanically coupled to the rail and to a carrier element supporting the rail. Also provided is a carrier element for the system and a method for actively attenuating acoustic vibrations of a rail for rail traffic.