【作者】 王新星；

【导师】 陆凤华；

【作者基本信息】 太原理工大学 ， 建筑技术科学， 2012， 硕士

【摘要】 高校大规模扩招,在学生人数急剧增多,师资力量相对缺乏的情况下,很多教学都采用了合班教学的模式,听课人数有时高达200多人。此类教室如果不做声学处理,大多存在混响时间过长、背景噪声较高以及教室后排声压级明显降低等问题,从而影响教学质量及师生的健康。本课题我们以太原理工大学研究生合班教室为例进行了音质研究。首先我们通过问卷调查的形式对该教室的音质进行了主观调查,调查结果显示,师生对未做声学装修的教室音质不满意,具体表现在混响时间过长,背景噪声较高,而影响背景噪声的因素主要是周围人的谈话声。第二我们使用了目前世界上最先进的双通道建筑声学分析系统Type2270对未进行声学装修的教室的混响时间及室内外噪声进行测量。测量的结果显示该教室混响时间较长,但空场时的背景噪声满足规范要求。第三我们借助于绿色建筑分析软件Ecotect Analysis来模拟计算教室内的混响时间,对室内音质设计的两个方案进行对比确定设计方案。在整个设计过程中,我们必须考虑装饰效果、经济、防火等因素的影响。第四我们对进行声学装修后的教室进行了混响时间测量。测量结果显示该教室音质设计的效果良好。最后在调研的基础上总结归纳了一些国内外教室音质设计案例。可供将来类似教室音质设计作参考,具有一定的应用价值。更多还原

【Abstract】 In case of large-scale expansion of universities and colleges,rapidly increasing number of students and relative lack of teachers,many universities and colleges apply the mode of combined class teaching, with the number of students attending a course more than200.If acoustical treatment lacks in such classrooms, there are problems,such as long reverberation time,high background noise and significantly decreasing sound pressure level at the back of the classrooms, which will affect the quality of teaching and the health of teachers and students.The analysis on the acoustics in graduate classroom of Taiyuan University of Technology are researched.Firstly,the subjective survey on the acoustical quality of classroom is conducted through questionnaire surveys.The results show that teachers and students are dissatisfied with the acoustics of classroom without acoustical treatment because of long reverberation time and high background noise whose main influencing factor is the ambient conversation.Secondly, the reverberation times and noises of classroom are tested without acoustical treatment with Dual Channel Building Acoustics System Type2270.The results show that the reverberation time is long, but the background noise in empty classroom meets requirements.Thirdly, the green building analysis software Ecotect Analysis is applied to make an analog calculation for the reverberation time in classroom, and to obtain the best design by contrasting two programs for room acoustical design. During the process of design, we must takes the factors (decorative effect, economical benefits,fireproofing,etc) into consideration.Fourthly, reverberation times are tested in classroom after acoustical treatment. The results show that the effect of the acoustical design is good.Finally, the acoustical designs of classroom at home and abroad are collected based on survey and author’s research. It has certain practical value that can offer the references for acoustical designs of classrooms.更多还原