虚拟座舱中的三维音响

3D Audio in Virtual Cockpit

对可提供三维空间听觉信息并增强人在虚拟环境中沉浸感的双耳声做了介绍．从声音传播、被感知角度，对双耳声的数学模型做了推导．由于头部相关传递函数和单声道的声音信号卷积可生成双耳声，因此对头部相关传递函数做了较详细的阐述．对长时间声音信号的卷积算法中的重叠保留法做了论述，对可仿真声源平滑运动的交叉衰减技术做了介绍。

This paper addresses the binaural sound which can provide three dimensional auditory cue and enhance the sense of immersion in virtual environment. The direction dependent Head Related Transfer Function(HRTF) can be measured and interpolated to convolute monophonic sound to generate binaural sound. The long time sound signal convolution can be realized via overlap save algorithm and crossfading technology is adopted to simulate the moving sound. In the end, the project to generate three dimensional sound for virtual cockpit in real time is designed.