基于超微孔吸声体的钢结构教室声环境优化研究

Research on Optimisation of the Acoustic Environment of Steel Classrooms Based on Ultra-microporous Acoustic Absorbers

依托H型钢梁侧面空腔构造,提出了融合装饰与声学设计的超微孔吸声体,将超微孔吸声体置于钢结构教室内部,通过声学仿真和现场实验测量改善前后的声环境状况,探究了超微孔吸声结构的吸声性能。结果表明,空腔深度150mm、内填50mm吸音棉的超微孔吸声结构吸声性能较好,综合式布置方案能在实现钢梁装饰效果的同时,显著改善钢结构教室的混响时间及语言清晰度,提高声环境品质。本研究可为相关工程提供参考。

Relying on the cavity structure on the side of the H-beam,a super-microporous acoustic absorber integrating decorative and acoustic design is proposed.The super-microporous acoustic absorber is placed in the interior of the steel classroom,and the acoustic performance of the super-microporous acoustic absorber is investigated through the acoustic simulation and field experiments by measuring the acoustic environment conditions before and after the improvement.The results show that the super-microporous acoustic structure with a cavity depth of 150 mm and filled with 50 mm sound-absorbing cotton has better sound absorption performance,and the integrated arrangement scheme can significantly improve the reverberation time and speech intelligibility of the steel-structured classroom and improve the quality of the acoustic environment while achieving the decorative effect of the steel beams.