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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。
Nanjing University Institute of Acoustics converted a stereo auditorium, acoustic design before the argument decided to use multi-layer cloth absorbing structure. Through standing wave tube test to find the appropriate material and laying method. Fitted to meet the expected acoustic conditions. This work is characterized by: paying special attention to the acoustic characteristics of the room during the acoustic design process, analyzing the normal mode distribution of the room theoretically; focusing on the low-frequency transmission frequency response during debugging, and trying to find the best stereo sounding Position (including the excitation point and the receiving point); and made a sounder evaluation of hearing sense. Through theoretical analysis, we also found some problems in room size proposed by some authors in the world. We also put forward some opinions on the tolerance of amplitude-frequency response through debugging and hearing evaluation. Some of the principles and issues raised in this report are of value to both the acoustic design of mono- and stereo-listening rooms. One of the authors, with the consent of the collaborators, is a tribute to the celebration of the seventieth anniversary of his alma mater.