Periodic Noise Characteristics and Acoustic Control in Long Highway Tunnels: An FEM Study with In Situ Validation.

Materials (Basel) · 2026 · PMC13117713 · PMID 42073714

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a decreasing trendno p-value reported

At 250 Hz, the SPL exceeds that at 125 Hz and also shows a decreasing trend with elevation, though the variations among measurement points become less regular.

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