基于声能量对比控制的稳健性虚拟声重放方法

Robust Virtual Sound Reproduction Using Acoustic Contrast Control

扬声器重放双耳信号是实现虚拟声重放的主要手段之一。传统双耳信号扬声器重放方法使用的串音消除网络对听音者头部位置变化非常敏感,系统稳健性差。结合声能量对比控制(Acoustic Contrast Control,ACC)提出了对听音者头部位置偏移具有稳健性的双耳信号重放方法。数值仿真结果表明,该方法可使听音者头部中心在宽听音区域内移动时信道分离度保持10 d B以上,验证了该方法可以提高双耳信号扬声器重放系统对听音者头部位置变化的稳健性。

Reproducing binaural signals by loudspeakers has been widely applied to simulate an auditory virtual environment where the listener perceives an acoustic source located at a position without any physical source. However, conventional crosstalk cancellation used by binaural signals reproduction lacks robustness with respect to listener＇s position and head movements. In this paper, a robust binaural signals reproduction method based on acoustic contrast control （ACC） is pro- posed. The simulation results show that this method proposed is capable of constructing a broad listening zone in the sound field. When listener＇s head moves inside the listening zone, eardrum sound pressure level difference between left ear and right ear can be maintained more than 10 dB while reproducing monaural signal. Thus, it is proved that the proposed method can achieve enough channel separation and crosstalk suppression, enhance system robustness to the variation of head position as well.