Abstract
Due to an increase in sport events such as world-cup soccer and other large-scale outdoor performances, a large number of multipurpose stadiums and gymnasiums were constructed throughout the world. Some research have been conducted on plans to utilise all-whether stadiums with fine figures, where large-scale spaces are available for various utilisations. All over the world, dome-type stadiums have been built, and are utilised not only for sports events but also for a variety of other large-scale events. PTFE (Polytetrafluoroethylene) is a membrane material mainly used for the outer ceiling surface of membrane structures. However, sufficient research has not been performed on the acoustical properties of the PTFE membrane material, which is widely used in the multipurpose stadiums. In this study, the air permeability values and sound absorption coefficient of PTFE membrane materials were measured and evaluated in a gymnasium. Practical application: This research will provide guidance to solving acoustical problems in dome type stadiums by explaining absorption properties of membrane materials. Solving the acoustical problems will greatly extend the functionality of dome type stadiums, such as hosting live concerts or recitals. The extended functionality will ultimately result in increased revenues for existing stadiums.
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