摘要
掩蔽和被掩蔽声源在水平面方向上空间分离的实验结果和分析表明:声源空间分离会使掩蔽阈值下降,产生空间去掩蔽现象。同时,空间去掩蔽与频率有关,频率越高,空间去掩蔽现象越明显,最大去掩蔽值为15 dB。其主要原因是掩蔽和被掩蔽声源在空间分离之后,由于头相关传输函数的影响,造成了单耳信掩比的提高。同时实验结果提示,高层听觉系统对双耳声信息综合处理也是空间去掩蔽的一个原因。
The theoretical analysis and experiment of the masker ＆ maskee＇s spatial separation in azimuth showed that when masker and maskee were spatially separated, thresholds tended to drop and produce the phenomenon of spatial unmasking. The results also showed that the spatial unmasking was frequency related. The higher the frequency was, the stronger the spatial unmasking was. The maximum unmasking was 15 dB. The main cue is that when a masker and a maskee sources are spatially separated in azimuth, the monaural Signal-to-Mask Ratio （SMR） will increase because of influence of Head Related Transfer Function （HRTF）. At the same time, the binaural processing of audio information by higher aural system is another reason of spatial unmasking.
出处
《声学学报》
EI
CSCD
北大核心
2006年第4期363-369,共7页
Acta Acustica
基金
国家自然科学基金资助项目(10374031)
