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Noise barrier - Wikipedia
Noise Barriers | PLEXIGLAS® Soundstop Noise Barriers
Highway Sound Barrier - Perforated Metal Panels for Sound Insulation
On Highway Noise Barriers, the Science Is Mixed. Are There Alternatives?
MassDOT finds an unusual place to hang solar panels: highway sound barriers - The Boston Globe
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Highway Noise Barrier Walls Reduce Noise Impact
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UK's first noise barriers to be built on a motorway are installed on M1 - YorkshireLive
