CPC E01F 8/0011 (2013.01) [E01F 8/0023 (2013.01); E01F 8/0029 (2013.01); G10K 11/16 (2013.01)] | 20 Claims |
1. A wall panel, comprising:
a block of expanded polystyrene including a cylindrical opening formed completely through the block;
a resonator tube disposed in the opening of the block, wherein the resonator tube is formed of a cylindrical metal tube;
a sound dampening material disposed within the resonator tube; and
an inlet pipe extending through the base material into the resonator tube.
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