声源指向性对教室内客观语言清晰度参数影响  

Influence of the Directivity of Source on the Objective Speech Intelligibility Parameters in a Classroom

作　　者：王挺[1] 彭健新[1,2] 孙海涛[1] 

机构地区：[1]华南理工大学亚热带建筑科学国家重点实验室,广东广州510640 [2]华南理工大学理学院物理系,广东广州510640

出　　处：《电声技术》2010年第2期4-6,12,共4页Audio Engineering

基　　金：国家自然科学基金项目(10774048);广东省科技计划项目(2008B080701020);华南理工大学亚热带建筑科学国家重点实验室开放课题(2008KB32)

摘　　要：对一大学教室建立声学仿真模型,采用无指向性声源和近似人声指向性的声源,通过声学仿真软件ODEON对该教室进行声学仿真,获取客观声学参数,比较不同指向性声源条件下教室内客观语言清晰度参数的差异,探讨声源指向性对教室内客观语言清晰度参数的影响。结果表明:采用无指向性声源将低估教室内的语言清晰度,其模拟得到的C50和STI比采用近似人声指向性的声源得到的结果偏低。A classroom is simulated using acoustic software ODEON. The objective speech intelligibility parameters in a classroom are obtained under the omni--directional source and directional source with its directivity similar to human condition. The difference of the objective speech intelligibility parameters in the modeled classroom under different directional sources condition is compared. The influence of the directivity of source on the objective speech intelligibility parameters is also discussed. The result shows that C50 and STI obtained from omni--directional source could be underestimated and are lower than those obtained from the directional source similar to human.

关 键 词：语言清晰度 声学仿真 声源指向性 早迟声能比 语言传输指数 

分 类 号：TU112[建筑科学—建筑理论]