同济大学教室室内外噪声状况调查

对同济大学教室室内外噪声现状进行了问卷调查和现场测试．结果表明：室内噪声以师生活动噪声为主，其次是教学设备噪声；而室外噪声以交通噪声为主，其中摩托车噪声是学生最不愿意听到的．校内教学区的背景噪声级为49．6dB（A）；室内无人时的背景噪声级可以低至31．4dB（A），一旦有学生自修，噪声级将提高到41．8dB（A）；课堂上实测室内的LA90．5min达到50．5dB（A）．三种使用条件下室内的等效A声级变化也较大，声级范围为33．9～69．6dB（A）．同时，在相同的使用状况下，在工作日（周一至周五），室内外噪声级比休息日高出约2dB（A）．

Exterior and Interior Noise Survey of Classrooms of Tongji University

Questionnaire surveys and spot measurements on noise inside and outside of the classrooms were carried out in Tongji University.The interior noise is mainly from the teacher and students,and then from the teaching equipments in classrooms.While the exterior noise is mainly from the traffic,of which motorcycle noise is the most antipathic noise to students.The average LA90,5 min level in campus is 49.6 dB(A).The LA90,5 min level in empty classrooms will increase from 31.4 dB(A) to 41.8 dB(A) when students are presented.And LA90,5 min level measured during class is 50.5 dB(A).Results show that LAeq,5 min level changes from 33.9 dB(A) to 69.6 dB(A),and exterior and interior noise levels in weekdays are about 2 dB(A) higher than weekends.