| http://www.w3.org/ns/prov#value | - A solid, six-foot-high wall of stucco-covered concrete, brick, or stone is the most effective barrier to traffic noise, provided the house is within 300 feet of the road. (Generally, if you can see the source of the noise, you???ll hear it, so you???d probably have to build a higher wall to keep out the roar of trucks.)
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