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A platform for research: civil engineering, architecture and urbanism
Acoustical performances of double ventilated glass facades
Modern Architecture and Double Ventilated Glass Facades (DVGF) are often related with each other: the use of enormous quantities of glass, steel and concrete are essential ingredients. DVGF could be briefly defined as facades consisting of two skins (completely transparent or not) with a very particular ventilation strategy. The acoustical European standard EN 12354 (2000) offers the possibility to predict facade insulation and insulation between rooms inter connected with a cavity. It has been concluded from this study that DVGF have an acoustical facade insulation that is far better (up to 10 dB) than that of traditional facades (office buildings). The special ways of ventilating the building and the 'doubling' of the skin of the facade play an important role. On the other hand due to transmission of sound through the cavity of a double facade, the acoustical insulation between rooms (on different floors) situated at the facade side, is lower compared to buildings with the same internal construction but with no cavity (values up to 8 dB), when no special measures are taken to prevent the (airborne) indirect transmission. To achieve good calculation matches, some modifications were introduced in the standard, i.e. the calculation per frequency band, taking into account either the 'Mass-Spring-Mass' or the 'Three Rooms model' depending on the frequency band and adaptations concerning free field conditions.
Acoustical performances of double ventilated glass facades
Modern Architecture and Double Ventilated Glass Facades (DVGF) are often related with each other: the use of enormous quantities of glass, steel and concrete are essential ingredients. DVGF could be briefly defined as facades consisting of two skins (completely transparent or not) with a very particular ventilation strategy. The acoustical European standard EN 12354 (2000) offers the possibility to predict facade insulation and insulation between rooms inter connected with a cavity. It has been concluded from this study that DVGF have an acoustical facade insulation that is far better (up to 10 dB) than that of traditional facades (office buildings). The special ways of ventilating the building and the 'doubling' of the skin of the facade play an important role. On the other hand due to transmission of sound through the cavity of a double facade, the acoustical insulation between rooms (on different floors) situated at the facade side, is lower compared to buildings with the same internal construction but with no cavity (values up to 8 dB), when no special measures are taken to prevent the (airborne) indirect transmission. To achieve good calculation matches, some modifications were introduced in the standard, i.e. the calculation per frequency band, taking into account either the 'Mass-Spring-Mass' or the 'Three Rooms model' depending on the frequency band and adaptations concerning free field conditions.
Acoustical performances of double ventilated glass facades
Akustische Eigenschaften doppelt belüfteter Glasfassaden
Blasco, M. (author) / Crispin, C. (author) / Ingelaere, B. (author)
2004
10 Seiten, 9 Bilder, 6 Quellen
Conference paper
English
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