124 600 m^3空间8.2 s RT_(60)游泳馆声系统工程(待续)——昆山游泳馆跳水馆建声电声综合设计STIPA探讨

124 600 m^3 Space 8.2 s RT_(60) Natatorium System Engineering(Continued)——STIPA Discussion of Architecture Acoustics and Electric-acoustics Integrated Design of Kunshan Swimming and Diving Hall Building

STIPA指标是建声电声综合设计之本。昆山游泳跳水馆比赛大厅的棚顶,采用大跨度桁架上张拉浅色的具有自然采光功能的PTFE膜结构,其玻璃幕墙面积超过墙体50%的面积,是造成建声RT60难以控制、STIPA难以达标的主因。在该馆第一次扩声系统工程验收时的第三方检测发现,最终的RT60达到8.2 s严重超标程度,同时STIPA也没达标。通过介绍在昆山游泳跳水馆扩声系统工程施工前的STIPA计算和EASE论证与该工程施工变更前的第二次STIPA计算与EASE论证,包括施工变更前、变更后的两次第三方检测各相同位置的STIPA指标测量对比情况,证明扩声施工变更方案是确实可行的,也证明了为实现STIPA目标的电声弥补建声设计理念的精确性和实用性。

STIPA indicator is base of architecture acoustics and electric - acoustics. The large - span truss light - colored PTFE tensioned membrane structure is used in the roof of Kunshan swimming and diving hall. Its glass curtain wall square is more than 50% of the area, which is the cause of B.T60 controlling difficulty and STIPA difficult compliance. While the first PA system engineering inspection the third - party testing found that the final RT60 achieves 8.2s which was exceeding seri- ously, and the STIPA didn＇t reach the standard. By introducing STIPA calculation, EASE demonstration and the second STIPA calculation and EASE demonstration before the Kunshan swimming and diving hall PA system engineering, including the STIPA indicators contrast situation at the same place twice by third - party before and after the change of construction. The change is proved that PA changing construction program is indeed feasible, and the design ideas＇ accuracy and practi- cality of theelectro - acoustic making up the architectural acoustics is also proved to achieve the STIPA goal.