个性化双耳房间脉冲响应对可听化质量的影响

可听化技术是室内声学研究的重要手段。在可听化研究中，为了方便，通常采用非个性化双耳房间脉冲响应（BRIR）来代替个性化BRIR，但这种替代可能在某些方面对可听化质量造成影响。为了研究这个问题，通过主观试验比较个性化BRIR和典型非个性化BRIR（KEMAR人工头BRIR）在可听化质量上的差异。首先，在一多媒体教室内，测量得到六名真人受试者和一个KEMAR人工头的BRIR，并与多种声音素材卷积得到双耳试验信号。然后，采用ABX主观比较方法对由受试者本人BRIR和KEMAR人工头BRIR合成的双耳信号进行试听比较。试验结果表明，受试者能通过音色等因素辨别两者的差异，四种试验信号的平均辨别正确率达到93％。这说明，个性化BRIR对可听化质量的影响是可被感知的。

The Effect of Individualized Binaural Room Impulse Response on Auralization Quality

Auralization is an important tool for room acoustics study. In auralization study, non-individualized individualized binaural room impulse response (BRIR) was often used to replace individualized BRIR for it’s convenience. However, this replacement would probably affect the auralization quality in some aspects. To address this problem, a listening test was performed to compare the differences of auralization quality between individualized and typical non-individualized BRIRs(for KEMAR manikin). Firstly,in a multimedia classroom, six subjects’ and a KEMAR manikin’s BRIRs were measured and then convoluted with various anechoic sound materials to generate the binaural test signals. Then the binaural signals synthesized by subjects’ own BRIRs and KEMAR manikin’s BRIR were compared in an ABX test. The test results show that subjects can discriminate the difference between these signals used for comparisons by using tone color etc., with an average discrimination rate of 93% over four sound materials. It suggests that the effect of individualized BRIR on auraliztion quality is audible.