厅堂内一点接收到的各早期反射声,对该点的音质影响很大。但一般从示波器上所摄得的早期反射声图诸,有时并不可靠.为了在设计过程中对这些反射声图谱进行比较或改进,可以利用计算机和以瞬态扩散的概念为基础,从各早期反射声在时间、空间和幅度三方面扩散是否均匀来考虑,定义出一个单一的量瞬态扩散系数D.利用D就可以对厅堂内各点或各厅堂之间的反射声图谱定量地进行比较.D也可用于厅堂内瞬态响应的分析和研究. The early reflected sound received in the hall a little, the sound quality of the point a great influence. However, it is sometimes not always reliable to get early reflections from an oscilloscope. To compare or improve these reflections in the design process, we can use the computer and the concept of transient diffusion, Early reflected sound in the three dimensions of time, space and amplitude diffusion is considered uniform, to define a single amount of transient diffusion coefficient D. D can be used to quantify the reflection of sound within the hall points or between the various halls Compare .D can also be used for analysis and research of transient response in the hall.