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- W784900190 abstract "Balconies provide noise screening effects in residential buildings even with the balcony door opened for natural ventilation. However, the screening effect of a balcony was found to be canceled due to the reflection from the ceiling. This paper describes a balcony whose ceiling is made from materials of inhomogeneous impedance which eliminates this drawback. The nonuniform impedance affects wave behavior by altering the direction of energy flux away from the region of a balcony as it reflects on the ceiling. A proposed realization of the balcony ceiling comprises a closely spaced array of progressively tuned hollow narrow tubes which create a phase gradient. The acoustic performance of a balcony with an inhomogeneous ceiling surface is examined theoretically by a ray-based model. All of the results predicted by the theory fit well with numerical simulations using a two-dimensional finite element method. Balconies with the proposed ceilings have the potential to be widely used in a roadside multi-residential building against the exterior traffic noise." @default.
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- W784900190 date "2015-11-01" @default.
- W784900190 modified "2023-10-13" @default.
- W784900190 title "Acoustic performance of balconies having inhomogeneous ceiling surfaces on a roadside building facade" @default.
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- W784900190 doi "https://doi.org/10.1016/j.buildenv.2015.06.027" @default.
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