多通路平面环绕声系统的分析及声像定位实验研究

Analyse and sound image Iocalization experiment on multi-channel plannar surround sound system

本文通过对一种完全理想的平面环绕声系统进行逐级近似，得到了一系列新的其性能逐级提高的平面环绕声系统．文中首先分析了完全理想系统的重发信号及系统在各级近似下的重发特性，给出了相应的独立传输信号和重发方程，探讨了各级近似重发间的兼容性问题。分析了系统重发时输出通路的简化条件，探讨了信号的检拾，记录，传输等问题和将系统付诸应用的可能性。文中对上述多通路平面环绕声系统（包括４－３－Ｎ系统）进行了声像定位实验，探讨了环绕声重发中声像定位与独立传输信号，重发扬声器数目的关系，得到了同理论分析相一致的结果，同时也为实际应用提供了实验基础。

In this paper the method of approximate expansion is used to analyse a Perfect planar surround sound system, resulting in an order of new and upgrade systems. First reproduction signals of the Perfect system and the characteristics of different orders systems are analysed. The independent transmission signals and decoding(reproduction) equation of the systems are given. The compatibility among different orders systems and the problem of simplifying output channals are discussed. The problem of signal picking up, recording, transmitting and the possibility of putting the system into practical use are studied. A sound image localization experiment for the systems is carried out in order to study image localization in relation to the numbers of transmission signals and output channels. The experimental result is consistent with the theoretical result. This work lay down a base for practical use.