| 镜面与扩散反射界面球形空间语言清晰度比较 |
| |
| 引用本文： | 张红虎,张三明.镜面与扩散反射界面球形空间语言清晰度比较[J].浙江大学学报(自然科学版 ),2010,44(4):812-818. |
| |
| 作者姓名： | 张红虎 张三明 |
| |
| 作者单位： | 浙江大学建筑技术科学研究所;华南理工大学亚热带建筑科学国家重点实验室; |
| |
| 基金项目： | 华南理工大学亚热带建筑科学国家重点实验室开放课题资助项目(2008KB21) |
| |
| 摘 要： | 定量分析扩散反射界面对球形空间内语言清晰度的改善作用.研究限定在几何声学的范畴内,无指向性点声源设在易引起球内声聚焦的典型位置球心上,界面吸声系数均匀分布.分别采用解析法与声学辐射度方法获得镜面与扩散反射界面球形空间的脉冲响应.计算与比较镜面与扩散反射界面球形空间内的脉冲响应和明晰度C50.为了衡量反射界面对球形空间内语言清晰度的改善效果,将球形空间与立方体空间的明晰度C50进行对比.结果表明,在镜面反射界面的球体中,C50值较低,而扩散反射界面能够在整体上提高C50值,尤其是在接近球心的声聚焦区域,但是界面反射模式引起的改善不如形体引起的改善有效.
|
| 关 键 词： | 镜面反射 扩散反射 室内声场 语言清晰度 |
Comparison of speech intelligibility in spherical spaces of
specularly and diffusely reflecting boundaries |
| |
| ZHANG Hong-hu,ZHANG San-ming.Comparison of speech intelligibility in spherical spaces of
specularly and diffusely reflecting boundaries[J].Journal of Zhejiang University(Engineering Science),2010,44(4):812-818. |
| |
| Authors: | ZHANG Hong-hu ZHANG San-ming |
| |
| Affiliation: | 1. Institute of Architectural Science and Technology, Zhejiang University, Hangzhou 310058, China;
2. State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China |
| |
| Abstract: | The performance of diffusely reflecting boundary to improve the speech intelligibility in spherical spaces was quantitatively explored.The research was limited within geometrical acoustics.Omni-directional point source was set at the sphere center,which is a typical position to cause sound focusing easily in a sphere.The boundary sound absorption coefficient was uniformly distributed.By calculating the sound impulse responses and related parameters,comparisons were made between the sound fields under two bo... |
| |
| Keywords: | specularly reflection diffusely reflection room acoustics speech intelligibility |
| 本文献已被 CNKI 等数据库收录！ |
| 点击此处可从《浙江大学学报(自然科学版 )》浏览原始摘要信息 |
|
点击此处可从《浙江大学学报(自然科学版 )》下载全文 |
