恰好,在喂信号和由左被创造的听觉的空间印象(ASI ) 的跨关联的系数之间的关系离开了在 5.1 隧道包围并且恰好包围扬声器包围健全系统被 psychoacoustic 实验调查。结果为由左右或左右的前面复制显示出那包围扬声器对,听觉的来源宽度(ASW ) 能被控制喂信号到某程度的 crosscorrelation 系数拓宽。在 ASW 和跨关联的系数之间的量的关系频率依赖者。为由一双侧面的扬声器复制,然而, ASW 不能被控制喂信号的跨关联的系数改变。为由前面复制并且仅仅用中央频率同时并且为粉红色的噪音和八音度噪音包围扬声器对 1kHz,听众包封(LEV ) 的一种强壮的感觉能被控制适当地喂信号的 crosscorrelation 系数获得。为有在 2 kHz 和 4 kHz 的中央频率的八音度乐队噪音,然而, LEV 不能被控制喂信号的 crosscorrelation 系数获得。在之间没有唯一的关系的进一步理论的计算和大小表演内部听觉跨关联(IACC ) 并且在 5.1 条隧道的 ASW 包围健全复制,它可能由于 IACC 的算法计算。进一步试验性的确认被需要为评估 ASI 调查 IACC 的适用性。现在的结果将对有用实际包围记录的健全编程和评估。
The relationship between the cross-correlation coefficients of feeding signals and auditory spatial impression(ASI) which are created by the left,right,left surround and right surround loudspeakers in 5.1 channel surround sound system is investigated by psychoacoustic experiments.The results show that for reproducing by the front left-right or left-right surround loudspeakers pair,the auditory source width(ASW) can be broadened by controlling the crosscorrelation coefficients of feeding signals to some extent.The quantitative relationships between ASW and the cross-correlation coefficients is frequency dependent.For reproducing by a pair of lateral loudspeakers,however,ASW can not be changed by controlling the cross-correlation coefficients of feeding signals.For reproducing by the front and surround loudspeakers pairs simultaneously and for pink noises and octave noises with central frequencies no more than 1kHz,a strong sense of listener envelopment(LEV) can be obtained by controlling the crosscorrelation coefficients of feeding signals properly.For the octave band noises with central frequencies at 2 kHz and 4 kHz,however,LEV can not be obtained by controlling the crosscorrelation coefficients of feeding signals.Further theoretical calculations and measurements show that there is no unique relationship between the inter-aural cross-correlation(IACC) and the ASW in 5.1 channels surround sound reproduction,which may be due to the algorithms of IACC calculation.Further experimental verifications are needed to investigate the applicability of IACC for evaluating ASI.The present results will be helpful to the actual surround sound programming recording and evaluation.