摘要
本文根据Gomperts的矩形透声系数理论,推导出了带有下缝的室内门隔声量的理论计算模型。为了验证其有效性,实验设计了11个不同宽度及深度的门下缝,在混响实验室内对其隔声量进行了测量,并与理论计算值进行了比较分析。研究结果显示,缝隙宽度是决定隔声量的主要因素;受缝隙共振的影响,在高频域某一个频率段内会发生隔声量明显下降的现象;全频域的理论计算值非常接近实验值;计权隔声量的理论计算值与实验计算值平均相差0.8 dB。
In this paper,according to the Gomperts＇ theory of acoustic transmission coefficient,a model to estimate the sound reduction index（SRl） of interior door with small aperture at bottom was established. In order to validate its effectiveness, 11 apertures with different size were designed and their SRIs were measured in the acoustic chamber. Furthermore, the experimental results were compared with the calculated ones. The results indicated that SRI of interior door was strongly affected by the aperture width. At high frequency domain,the SRI decreased obviously with the resonance effect. For the whole frequency domain, the values calculated based on the theory were in good agreement with the measured ones. In addition, the average difference of weighted SRI between measured and calculated values was only O. 8 dB.
出处
《建筑科学》
北大核心
2012年第2期37-41,共5页
Building Science
关键词
隔声量
门
缝隙
隔声
透声系数
sound reduction index, door,aperture, sound insulation, acoustical transmission coefficient
