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(一) 随着现代建筑的飞跃发展,大批公共建筑的出现,特别是会堂,剧院、影院的兴建,都对建筑声学提出了很多要求,这些建筑物的观众厅内都希望有良好的音响效果。以往在音质设计中,多半是根据—些理论和经验公式进行计算。 由于计算公式和实际房屋中的边界条件在某种程度上存在一定的距离,因此与建成后的观众厅音质状况还不会完全符合。很早以前一些声学家曾利用模型试验来进行音质研究,一般采用光波和水波在模型中的反射和所产生的干涉图形来分析室内声场,这种试验方法只局限在一个平面上。近年来由于超声学和电子学的发展,一些国家利用脉冲
(1) With the rapid development of modern architecture, the emergence of a large number of public buildings, especially the construction of auditoriums, theaters and cinemas, has placed a lot of demands on architectural acoustics. The auditoriums of these buildings all hope to have good sound effects. . In the past, sound quality design was mostly based on some theoretical and empirical formulas. Due to the certain distance between the calculation formula and the boundary conditions in the actual house, the quality of the auditorium after the completion of the auditorium is still not fully consistent. Some time ago, some acousticians used model tests to perform sound quality studies. The reflections of light waves and water waves in the model and the resulting interference patterns were used to analyze the indoor sound field. This test method was limited to only one plane. In recent years, due to the development of ultrasound and electronics, some countries have used pulses.