Akeroyd Michael A, Chambers John, Bullock David, Palmer Alan R, Summerfield A Quentin, Nelson Philip A, Gatehouse Stuart
MRC Institute of Hearing Research (Scottish Section), Glasgow Royal Infirmary, Alexandra Parade, Glasgow G31 2ER, United Kingdom.
J Acoust Soc Am. 2007 Feb;121(2):1056-69. doi: 10.1121/1.2404625.
Cross-talk cancellation is a method for synthesizing virtual auditory space using loudspeakers. One implementation is the "Optimal Source Distribution" technique [T. Takeuchi and P. Nelson, J. Acoust. Soc. Am. 112, 2786-2797 (2002)], in which the audio bandwidth is split across three pairs of loudspeakers, placed at azimuths of +/-90 degrees, +/-15 degrees, and +/-3 degrees, conveying low, mid, and high frequencies, respectively. A computational simulation of this system was developed and verified against measurements made on an acoustic system using a manikin. Both the acoustic system and the simulation gave a wideband average cancellation of almost 25 dB. The simulation showed that when there was a mismatch between the head-related transfer functions used to set up the system and those of the final listener, the cancellation was reduced to an average of 13 dB. Moreover, in this case the binaural interaural time differences and interaural level differences delivered by the simulation of the optimal source distribution (OSD) system often differed from the target values. It is concluded that only when the OSD system is set up with "matched" head-related transfer functions can it deliver accurate binaural cues.
串扰消除是一种使用扬声器合成虚拟听觉空间的方法。一种实现方式是“最优声源分布”技术[T. Takeuchi和P. Nelson，《美国声学学会杂志》112, 2786 - 2797(2002)]，其中音频带宽被分配到三对扬声器上，这些扬声器分别放置在方位角为±90度、±15度和±3度的位置，分别传输低频、中频和高频。针对该系统开发了一个计算模拟，并与在使用人体模型的声学系统上进行的测量结果进行了验证。声学系统和模拟都实现了近25 dB的宽带平均消除。模拟结果表明，当用于设置系统的头相关传递函数与最终听众的头相关传递函数不匹配时，消除效果降低到平均13 dB。此外，在这种情况下，最优声源分布(OSD)系统模拟所提供的双耳耳间时间差和耳间声级差往往与目标值不同。得出的结论是，只有当OSD系统使用“匹配”的头相关传递函数进行设置时，它才能提供准确的双耳线索。
