某聋儿康复机构教室内噪声和混响情况调查  

An investigation on the classroom noise and reverberation time in a rehabilitation center for hearing-impaired children

作　　者：李炬[1] Grant Preston 王丽燕[1] 龙江[1] 

机构地区：[1]中国聋儿康复研究中心,北京100029 [2]香港大学

出　　处：《中国听力语言康复科学杂志》2008年第6期22-23,共2页Chinese Scientific Journal of Hearing and Speech Rehabilitation

摘　　要：目的调查某聋儿康复中心教室内的声学环境。方法用声级计测试3个教室未使用时和使用时的噪声水平,采用赛宾(W.C.Sabine)公式计算出3个教室的混响时间。结果3个教室在未使用时和使用时所测噪声水平最高为34.6dB(A)和78.3dB(A),最低为33.4dB(A)和70.2dB(A),混响时间最高为1.41s,最低为0.58s。结论应关注聋儿康复机构在教室声学环境方面存在的一些问题。Objective To investigate the classroom acoustics in a rehabilitation center for hearing-impaired children. Methods The noise levels in three unoccupied and occupied classrooms were measured with a sound level meter and reverberation time was calculated using Sabine Formula. Results The highest noise levels in the three classrooms were 34.6 dB （A） and 78.3 dB （A） when unoccupied and occupied, respectively. The lowest noise levels were 33.4 dB （A） and 70.2 dB （A）, respectively. The maximum reverberation time was 1.41 s and the minimum was 0.58 s. Conciusion The results indicate that the classroom acoustics at this center present potential problems for effective communication.

关 键 词：教室 混响 混响时间 

分 类 号：R49[医药卫生—康复医学] R764[医药卫生—临床医学]