Panel assembly for traffic noise barrier wall

A panel assembly for a traffic noise barrier wall of the type including opposing slots formed in pairs of vertically-mounted posts, the panel assembly comprising:

• a sheet of material having top, bottom, and side edges forming a perimeter of the sheet, said sheet having a sheet thickness that is less than each of said first slot width and said second slot width;
• and
• a frame disposed along at least a portion of the perimeter of the sheet, wherein the frame includes a bracket having a base portion with a substantially triangular cross-section, said base portion being disposed along edges of the sheet, said base portion defining a channel for capturing edges of the sheet, said channel being positioned at an apex of said base portion, wherein an elastomeric gasket is disposed between outer surfaces of edges of the sheet and surfaces forming the channel.