Diffractor for diffracting sound
Assignee4Silence B.V.
InventorYsbrand Hans Wijnant
Life of this patent
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Abstract
Diffractor for diffracting sound of traffic on a travel surface with at least one diffraction plate disposed laterally beside the travel surface. The diffraction plate is provided with a pattern of recesses in the upper surface thereof for the purpose of diffracting the traffic noise in a direction which differs from the lateral direction. Each of the recesses is divided into individual resonators by intermediate walls provided in the recesses. The recesses have acoustically substantially non-absorbing walls and are free of acoustically absorbing material. The intermediate walls between adjacent resonators have at least one throughflow opening along which the rainwater can flow from the one resonator to the other.
Claims31
A diffractor for diffracting sound of traffic on a travel surface, the diffractor comprising at least one diffraction element disposed in a lateral direction beside the travel surface, wherein the at least one diffraction element comprises a pattern of recesses in the upper surface thereof, wherein the at least one diffraction element is configured for diffracting a traffic noise in a direction which differs from the lateral direction, wherein each of the recesses is divided into individual resonators by intermediate walls provided in the recesses, wherein each of the recesses has an acoustically substantially non-absorbing wall and is free of an acoustically absorbing material, and wherein the intermediate walls between adjacent resonators comprise at least one throughflow opening configured to allow rainwater to flow from the one resonator to another, wherein the diffraction element comprises a lower plate and an upper plate placeable thereon and wherein the bottom of the recesses is formed by the upper side of the lower plate and the recesses are arranged only in the upper plate.
A diffractor for diffracting sound of traffic on a travel surface, the diffractor comprising at least one diffraction element disposed in a lateral direction beside the travel surface, wherein the at least one diffraction element comprises a pattern of recesses in the upper surface thereof, wherein the at least one diffraction element is configured for diffracting a traffic noise in a direction which differs from the lateral direction, wherein each of the recesses is divided into individual resonators by intermediate walls provided in the recesses, wherein each of the recesses has an acoustically substantially non-absorbing wall and is free of an acoustically absorbing material, and wherein the intermediate walls between adjacent resonators comprise at least one throughflow opening configured to allow rainwater to flow from the one resonator to another, wherein the recesses are arranged along the travel surface in a number of successive parallel rows of resonators, wherein a depth of the recesses decreases per row in a direction away from the travel surface, and wherein the depths of ten of the mutually adjacent rows decreases.
Dependencies are inferred from the claim text.