A study on acoustical design criteria of the balcony configuration in auditoria

礼堂阳台结构声学设计标准研究

基本信息

批准号：
03452228
负责人：
FUJIMOTO Kazutoshi
金额：
$ 4.42万
依托单位：
KYUSHU UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for General Scientific Research (B)
财政年份：
1991
资助国家：
日本
起止时间：
1991 至 1993
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-03452228/
关键词：
Room Acoustics Concert Hall Balcony Direct Sound Early Reflections from Upside Psycho-Acoustical Experiment Auditory Impression of Envelopment 模型実験音響設計コンサ-トホ-ルバルコニ-

项目摘要

A balcony overhang is frequently set up in auditoria. The sectional shape of the under-balcony space is one of the most important factors for good acoustics in auditoria. The acoustical properties under the overhang, however, have not been clarified yet and there is so far no generally accepted criteria for acoustical of the balcony configuration. The object of this study is to make clear the relation between the shape of the balcony and the acoustical properties.As the second step, the subjective effects of the delay time(DELTAt) and the level(L) of reflections from upside is examined by psycho-acoustical experiments, because the structure of early reflections from upside, which is affected by the presence of a balcony, is regarded as one of the causes of acoustical defect under the balcony in auditorium. Simulated music sounds with a single or two reflections are uesd as stimuli. The results show that auditory size of sound image becomes smaller as DELTAt and L are smaller. Next, simulated music sound with early reflections both from horizontal directions and from upside are used as stimuli. The results show that envelopment becomes stroger as vertical component of reflected energy increases when lateral energy fraction is constant. These facts suggest that lack of early reflections from ceiling above main orchestra is a factor for disturbing good acoustics under the balcony.

在Auditoria经常建立阳台悬垂。底层下空间的截面形状是观察良好声学的最重要因素之一。但是，悬垂下的声学特性尚未澄清，到目前为止，尚无公认的阳台配置声学标准。这项研究的目的是要清楚阳台的形状与声学特性之间的关系。第二步，延迟时间（Deltat）的主观效应和颠上的反射水平（l）的水平（L）受到心理声学实验的检查，是由心理声学实验进行的，因为早期反射的结构是由静置的未经范围影响的，这是一个镇定的范围，这是一个镇的范围，这是一个镇的范围。礼堂。模拟音乐的声音具有单一或两种反射为uesd作为刺激。结果表明，随着deltat和l较小，声音图像的听觉大小变小。接下来，从水平方向和上升方向的早期反射的模拟音乐声音都被用作刺激。结果表明，随着横向能量分数恒定时，反射能量的垂直成分增加，信封变成了词干。这些事实表明，主要乐团上方的天花板上缺乏早期反思是扰乱阳台下良好声学的一个因素。