关于审听室的声学设计和室内声学的若干问题

关于审听室的声学设计和室内声学的若干问题 THE DESIGN OF A LISTENING ROOM AND SOME PROBLEMS ON ROOM ACOUSTICS 包紫薇 Bao Ziwei and Fan Henian 1 first-author 范鹤年 1 南京大学声学研究所 南京大学声学研究所 Institute of Acoustics, Nanjing University Institute of Acoustics, Nanjing University 南京大学声学研究所改装了一间立体声审听室,声学设计之前经过论证决定采用多层布吸声结构。通过驻波管测试找到了合适的材料和铺设方法。装成后达到了预期的声学条件要求。此项工作的特点是:在声学设计过程中特别注重房间的波动声学特性,从理论上分析了房间的简正模式分布;调试时以低频传输频响为重点,力求找到立体声审听的最佳位置（包括激励点和接收点）;并作了声象定位的听感评价。通过理论分析还发现了国际上一些作者提出的房间体型存在的问题,通过调试及听感评价也对幅频响应的容限提出了一些看法。本报告提出的一些原则问题对单声道及立体声审听室的声学设计都有参考价值。作者之一,并征得合作者同意,以此怍为向母校七十周年大庆的献礼。 A listening room with cotton drapes suspended at the λ/4 distances of 100,125, 160, 200 c/s from the wall as main absorption material and with rever-beration time,about 0.3 see had been fitted up by the authors and investigated essentially in low frequency range based on wave acoustics. Through analyses of normal modes, measurements and adjustments of the transfer functions, and subjective listening examination, the authors raised some questions and suggestions in room acoustics such as the torelances of frequency distribution and level difference on transfer function, the frequency which differentiates wave/geometrical acoustics, as well as the criteria of room dimensional ratios preferred by different authors, 1984-03-01 2021-04-01 3