Previous studies indicate that acoustic improvements at classroom-level, such as using ceiling panels, do not work well to solve noise problems in classrooms. Therefore, this study introduced a new way – individual control – to improve classroom acoustics. The acoustic effect of five different classroom settings is simulated: two individual-level acoustic improvement settings (“Single-sided canopies” and “Double-sided canopies”), two classroom-level acoustic improvement settings (“Half-ceiling” and “Full-ceiling”), and one “Control” setting. The simulation was accomplished with Computer Aided Theatre Technique (CATT-Acoustic™), which is a ray-tracing-based room acoustics prediction software package. According to the two main ways of using classrooms (instruction and self-study), the simulations were run for two situations: instruction situation and self-study situation, and the Lombard Effect was taken into consideration in the self-study situation. The results showed that in both situations, all of these improvement settings, compared with the “Control” setting, could shorten the reverberation time and increase the speech transmission index, and the improvements caused by the individually controlled canopies were more obvious than caused by the ceiling panels. Additionally, in the instruction situation, the individual-level improvements could increase the sound pressure level of the teacher’s speech, while in the self-study situation, the individual-level improvements could decrease the sound pressure level of other children’s talk. In the future, it is recommended to produce and test different individually controlled devices in a lab or real classroom to verify these results.

先前的研究表明，在教室级别的声学改进（例如使用天花板）无法很好地解决教室中的噪音问题。因此，这项研究引入了一种新的方法-个人控制-以改善教室的声学效果。模拟了五个不同教室设置的声学效果：两个个人级别的声学改善设置（“单侧顶篷”和“双面遮阳篷”），两个教室级别的声学改善设置（“半顶”和“全顶” -天花板”）和一项“控制”设置。仿真是通过计算机辅助剧院技术（CATT-Acoustic™）完成的，该技术是基于光线跟踪的室内声学预测软件包。根据使用教室的两种主要方式（指导和自学），针对两种情况进行了模拟：教学情况和自学情况，并且在自学情况下考虑了伦巴德效应。结果表明，在两种情况下，与“控制”设置相比，所有这些改进设置都可以缩短混响时间并提高语音传输指数，并且由单独控制顶篷引起的改进比由“控制”设置引起的改进更为明显。天花板。另外，在教学情况下，个人水平的提高可以增加教师讲话的声压级，而在自学情况下，个人水平的改进​​可以降低其他孩子讲话的声压级。将来，