MLS扩散体对KTV房车声学性能改善研究  

Research on Improvement of Acoustic Performance of KTV RV by MLS Diffuser

作　　者：林跃华[1] Lin Yuehua(School of Architecture and Civil Engineering,Xiamen University,Xiamen Fujian 361005,China)

机构地区：[1]厦门大学建筑与土木工程学院,福建厦门361005

出　　处：《城市建筑》2021年第22期114-117,共4页Urbanism and Architecture

基　　金：国家自然科学基金资助项目“基于热环境智能调控的气候适应性可变建筑表皮设计研究”(51778549)。

摘　　要：本文以MLS扩散体在KTV房车中声学性能的改善为研究对象,根据车厢的空间尺寸,确定车厢混响时间调控目标。采用传统MLS扩散体材料改造、家具布置、窗帘控制等混响时间调节方法,对KTV房车的车厢进行声学性能改善。通过100~4000 Hz进行1/3倍频程的混响时间测试分析,得出以下结论:①改造后的KTV房车在MLS扩散体的作用下,500~1000 Hz的混响时间分别降到了0.22 s和0.25 s;②250~2000 Hz的混响时间平均值为0.24 s,满足混响时间的(0.3±0.10)s的设计目标;③低频端和高频端的混响时间相对于中频端均有0.08~0.09 s的上升,改造后的车厢的声环境具有一定的“空间感”;④KTV房车低频端的混响时间相对于高频端较短,可减弱对高频端的掩蔽效应风险,增加了KTV车厢的语言清晰度。In this paper,the acoustic performance improvement of MLS diffuser in KTV RV is taken as the research object.According to the space size of the car,the reverberation time control target of the car is determined.The acoustic performance of KTV RV is improved by using the traditional MLS diffuser material transformation,furniture layout,curtain control and other reverberation time adjustment methods.Through the test and analysis of 1/3 octave reverberation time from 100 Hz to 4000 Hz,the following conclusions are obtained.Firstly,the reverberation time of 500 Hz and 1000 Hz of the modified KTV RV is reduced to 0.22 s and 0.25 s respectively under the effect of MLS diffuser.Secondly,the average reverberation time of 250 Hz to 2000 Hz is 0.24 s,which meets the design target of(0.3±0.10)s of reverberation time.Thirdly,the reverberation time of low-frequency and high-frequency is 0.08s~0.09s higher than that of medium frequency,and the sound environment of the transformed car has a certain“sense of space”.Fourthly,the average reverberation time of low-frequency of KTV RV is shorter than that of high-frequency,which can reduce the risk of masking effect on high-frequency and increase the language clarity of KTV RV.

关 键 词：MLS扩散体 声学 混响时间 建筑表皮 

分 类 号：TB5[理学—物理]