Acoustics Research Institute, Austrian Academy of Sciences, A-1040 Vienna, Austria.
J Acoust Soc Am. 2013 Apr;133(4):2055-68. doi: 10.1121/1.4792355.
The sound-source localization provided by a crosstalk cancellation (CTC) system depends on the head-related transfer functions (HRTFs) used for the CTC filter calculation. In this study, the horizontal- and sagittal-plane localization performance was investigated in humans listening to individualized matched, individualized but mismatched, and non-individualized CTC systems. The systems were simulated via headphones in a binaural virtual environment with two virtual loudspeakers spatialized in front of the listener. The individualized mismatched system was based on two different sets of listener-individual HRTFs. Both sets provided similar binaural localization performance in terms of quadrant, polar, and lateral errors. The individualized matched systems provided performance similar to that from the binaural listening. For the individualized mismatched systems, the performance deteriorated, and for the non-individualized mismatched systems (based on HRTFs from other listeners), the performance deteriorated even more. The direction-dependent analysis showed that mismatch and lack of individualization yielded a substantially degraded performance for targets placed outside of the loudspeaker span and behind the listeners, showing relevance of individualized CTC systems for those targets. Further, channel separation was calculated for different frequency ranges and is discussed in the light of its use as a predictor for the localization performance provided by a CTC system.
串扰消除（CTC）系统提供的声源定位取决于用于 CTC 滤波器计算的头相关传递函数（HRTF）。在这项研究中，研究了人类在聆听个性化匹配、个性化但不匹配和非个性化 CTC 系统时的水平和矢状面定位性能。通过双耳虚拟环境中的耳机模拟了系统，该环境中有两个虚拟扬声器在听众前方空间化。个性化不匹配系统基于两组不同的听众个体 HRTF。两组都提供了类似的双耳定位性能，在象限、极和侧向误差方面。个性化匹配系统提供的性能与双耳聆听相似。对于个性化不匹配系统，性能会恶化，而对于非个性化不匹配系统（基于其他听众的 HRTF），性能恶化得更严重。方向相关分析表明，失配和缺乏个性化会导致扬声器跨度之外和听众后面的目标的性能大幅下降，这表明个性化 CTC 系统对于这些目标是相关的。此外，还计算了不同频率范围内的声道分离，并根据其作为 CTC 系统提供的定位性能的预测因子进行了讨论。
