WHIS

Sound insulating, sound absorbing, sound proofing or sound reducing building elements and constructions of metal designed to deflect noise, namely, freestanding or wall-mounted plates in the nature of clad steel plates and sheets, tiles, wall panels and cladding for the insulation, absorption, bending, blocking or reduction of sound and noise along roads, railways and other transportation corridors; structural parts of the aforementioned products

Acoustic insulating materials and architectural acoustic products, namely acoustic plates, screens, tiles, walls or cladding for the insulation, absorption, bending, blocking or reduction of sound, not of metal; structures, not of metal, for the insulation, absorption, bending, blocking or reduction of sound in the nature of acoustic insulating materials and architectural acoustic products, namely sound absorbers and diffusers; sound proofing and sound insulating materials for use along highways, railway tracks and other roads, namely sound barrier, sound absorbing or sound diffusing tiles and panels for use along roads and railways and other transportation corridors; acoustic baffle panels and tiles, not of metal, for soundproofing purposes;structural parts of the aforementioned products

Building materials and constructions, not of metal, comprising a sound insulating, sound absorbing, sound bending, sound blocking or sound reducing effect as a main component in the nature of non-metal building materials that deflect sound, namely, freestanding or wall-mounted plates in the nature of armor-plating, not of metal, for building, tiles, wall panels and cladding for the insulation, absorption, bending, blocking or reduction of sound and noise along roads, railways and other transportation corridors