Faculty of Engineering, Science and Built Environment, London South Bank University, Borough Road, London SE1 0AA, United Kingdom.
J Acoust Soc Am. 2011 Sep;130(3):1399-410. doi: 10.1121/1.3613932.
This paper reports the results of a large scale, detailed acoustic survey of 42 open plan classrooms of varying design in the UK each of which contained between 2 and 14 teaching areas or classbases. The objective survey procedure, which was designed specifically for use in open plan classrooms, is described. The acoustic measurements relating to speech intelligibility within a classbase, including ambient noise level, intrusive noise level, speech to noise ratio, speech transmission index, and reverberation time, are presented. The effects on speech intelligibility of critical physical design variables, such as the number of classbases within an open plan unit and the selection of acoustic finishes for control of reverberation, are examined. This analysis enables limitations of open plan classrooms to be discussed and acoustic design guidelines to be developed to ensure good listening conditions. The types of teaching activity to provide adequate acoustic conditions, plus the speech intelligibility requirements of younger children, are also discussed.
本文报告了对英国 42 间不同设计的开放式平面教室进行大规模、详细声学调查的结果，每间教室包含 2 至 14 个教学区或教室单元。描述了专为开放式平面教室设计的客观调查程序。介绍了与教室单元内语音可懂度相关的声学测量值，包括环境噪声水平、干扰噪声水平、语音与噪声比、语音传输指数和混响时间。还研究了关键物理设计变量对语音可懂度的影响，例如开放式平面单元内的教室单元数量以及为控制混响选择的吸声材料。这种分析可以讨论开放式平面教室的局限性，并制定声学设计准则以确保良好的聆听条件。还讨论了提供足够声学条件的教学活动类型，以及年幼儿童的语音可懂度要求。
