CAJ | 학술논문

教室内背景噪声级与教师授课声级是影响教室声环境的两个重要声学参量。对广州市10所小学的教室背景噪声级与教师授课声级进行测量和分析，结果表明：空场教室内平均背景噪声级超过《民用建筑隔声设计规范》中对教室噪声限值的规定；课堂上，教室内背景噪声级与教师授课声级平均值分别为61.5 dBA、70.7 dBA，教室内背景噪声级与教师授课声级随学生年龄增长均有降低的趋势，但信噪比维持在9.5 dBA左右。
교실내배경조성급여교사수과성급시영향교실성배경적량개중요성학삼량。대엄주시10소소학적교실배경조성급여교사수과성급진행측량화분석，결과표명：공장교실내평균배경조성급초과《민용건축격성설계규범》중대교실조성한치적규정；과당상，교실내배경조성급여교사수과성급평균치분별위61.5 dBA、70.7 dBA，교실내배경조성급여교사수과성급수학생년령증장균유강저적추세，단신조비유지재9.5 dBA좌우。
Background noise levels and teachers’speech levels are two important acoustical parameters which affect classrooms’acoustical environment. Measurements of background noise levels and teachers’speech levels were conduct in the classrooms of 10 elementary schools in Guangzhou. The results show that background noise level in unoccupied classrooms is beyond the threshold stated in“Code for design of sound insulation of civil buildings”. In working class, teachers’speech level is 70.7 dBA and noise pressure level is 61.5 dBA. The average background noise level and teachers’ average speech level would decrease with the growth of students’age, but signal to noise ratio retains about 9.5 dBA.