A wall panel has a block of base material, e.g., expanded polystyrene. A resonator tube is disposed in the block. A sound dampening material is disposed in the resonator tube. The sound dampening material can be recycled mattress or carpet. An inlet pipe extends into the resonator tube. A vent is disposed over the inlet pipe. A barrier wall can be formed by stacking multiple wall panels. Additional resonator tubes can be disposed between the wall panels.

The sound absorbing board includes a body and multiple sound absorbing elements. The body has a first side surface and a second side surface. The multiple sound absorbing elements are formed on the body at spaced intervals, and each one of the multiple sound absorbing elements has a protrusion, a groove, and two sound absorbing openings. The protrusion is formed on the first side surface of the body. The groove is formed on the second side surface of the body and has multiple concave portions and at least one convex portion. The multiple concave portions are formed on a bottom surface of the groove. The at least one convex portion is formed on the bottom surface of the groove, and is formed between two adjacent ones of the multiple concave portions. The two sound absorbing openings are formed on the two opposite side surfaces of the protrusion, respectively.

A lateral support device for stabilizing an elongate foundation post installed in a substrate. The lateral support device may include at least one engagement member for engaging the elongate foundation post. The lateral support device may also include a support plate extending from the at least one engagement member. The support plate may have a plate width greater than a post width of the elongate foundation post. The support plate may be slidable relative to the foundation post in an elongate direction when the at least one engagement member engages at least a portion of the elongate foundation post. When the engagement member is in an engaged position, at least a portion of the support plate is below the grade of the substrate.

A sound barrier includes panels comprising a polymeric material and reinforcing inserts encased within the polymeric material; and a frame comprising posts positioned in spaced, parallel relationship and extending vertically upward, and defining inwardly-facing slots for receiving the panels. The panels are mounted lengthwise with ends within the slots and adjacent panels engage each other by tongues and grooves of lateral surfaces. Methods of making the sound barrier are provided.

A stiffener member for a hollow elongate panel. The hollow elongate panel may include a first end wall having a groove formation formed by a pair of inner walls and extending a length of the hollow elongate panel. The groove formation may extend into the hollow elongate panel. The stiffener member may include a bight member having opposing ends; a pair of arm members respectively extending from one of the opposing ends of the bight member to provide a substantially U-shaped configuration; and a flange member extending from each of the pair of arm members. The flange member may extend inwardly to abut one of the pair of inner walls of the groove formation when the stiffener member is received within the hollow elongate panel.

A device is provided for vertically attaching to a wall, in particular to a noise barrier, including a frame and at least two tins which have solar panels and are provided on a front face of the frame, wherein at least two supporting projections, each with a bearing for supporting the frame, extend outwards from a rear face of the frame, the fins forming elongate frame struts.

Embodiments relate to a plastic wall panel, comprising a hollow body having external walls and defining an internal cavity. The external walls include: a first major side wall, a second major side wall opposite the first major side wall, a minor top wall, a minor bottom wall, a first minor end wall and a second minor end wall opposite the first minor end wall. The minor top wall and the minor bottom wall each define mating structure to mate and align with another adjacent panel so that multiple panels can be tiled together to form at least part of a sound attenuation barrier. The hollow body defines a passage extending between the first and second major side walls and through the first and second minor end walls to receive a reinforcing beam.

A highway sound barrier system that uses a plurality of foam panels that are joined with an upright member assembly. The foam panels use a foam core and exterior weather protection compounds allowing the system to dramatically reduce transportation, handling and installation costs while increasing the lifecycle of the barrier system and reducing long term maintenance requirements. Moreover, the foam panels include rotatable joints and cable reinforcement allowing the wall to be easily adjusted to facilitate various landscape parameters and provide for rapid construction.

A sound absorbing structure includes a wall having a first side and a second side and at least one acoustic scatterer coupled to a first side of the wall. The first side of the wall may be positioned to face a source of noise, such as moving motor vehicles, airplanes, and the like. The at least one acoustic scatterer has an opening and at least one channel. The at least one channel has a channel open end and a channel terminal end with the channel open end being in fluid communication with the opening.

A sound barrier system for use in mitigating noise having an origami sheet or origami-inspired mechanism that can use folding to change configuration and lattice topology; and a plurality of cylindrical inclusions disposed on top of the origami sheet. The plurality of cylindrical inclusions being periodically arranged such that folding kinematics of the origami sheet induces reconfiguration of the periodicity of the plurality of cylindrical inclusions and associated wave blocking of the noise.