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- W325842237 abstract "Access to closed courtyards in city centres can offer the people living there a place of health and well-being regarding the adverse effects of road traffic noise. Due to combined effects of the contribution of many distant sources and multiple facade reflections in the courtyards, the equivalent sound levels might exceed 45 dB(A), a level desired regarding health and well-being. In this numerical study, the effect of adding absorption material for two courtyards modelled from real situations has been investigated for an incoherent line source outside the courtyards, modelled as canyons. The position and absorption coefficient of the applied absorption material have been varied. It can be concluded that facade absorption material is most effective when applied in the upper part of the facades. Also, it is shown that absorption material distributed over both facades gives a larger reduction than when concentrated to one facade only. The reduction by adding absorption is largest for observer positions low in the canyon. By applying absorption treatments, low frequencies can be reduced more effectively than high frequencies." @default.
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- W325842237 date "2007-01-01" @default.
- W325842237 modified "2023-09-27" @default.
- W325842237 title "Improving the shielding of road traffic noise in courtyards: absorption treatments" @default.
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