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1958年我们在天津市干部俱乐部扩建的观众厅中,为了满足声学上的要求,在设计中采用了六角形平面。这座观众厅要求除开会和报告外不用扩音设备,而且造价要比较经济。 观众厅声学设计,基本上包括两个内容:外来噪声的隔绝和室内音质的控制。 这座观众厅位在郊区,环境幽静,根据参考资料介绍外来噪声一般不会超过80分贝,空场容许噪声级为40分贝。所需总透射损失为80-40+5=45分贝(5分贝是安全值)。计算结果如下:
In 1958, we used the hexagonal plane in the design in order to meet the acoustic requirements in the audience hall of the expansion of the Tianjin Cadre Club. The auditorium requested that there should be no amplifying equipment other than meetings and reports, and that the cost would be more economical. Auditorium acoustic design, basically includes two elements: the isolation of alien noise and the control of indoor sound quality. The auditorium is located in a quiet area in the suburbs. According to the reference, it is generally stated that the external noise does not exceed 80 decibels, and the allowable noise level of the open air field is 40 decibels. The total transmission loss required is 80-40 + 5 = 45 dB (5 dB is a safe value). The result of the calculation is as follows: