做头相关传输函数（HRTF）的一篇参考文档。这方面的英文文档一般都是在IEEE，AES，JASA上付费才能下到的。-The article is about head-related-transfer-function technology.

本文档设计的虚拟环绕立体声系统，将普通双声道音频信号经过数字信号处理器(DSP)处理，转变成具有环绕立体声效果的双声道音频信号。-This document is designed for virtual surround sound system, the ordinary two-channel audio signal through a digital signal processor (DSP) treated with a two-channel audio into surroun