The detectability of headtracker latency in virtual audio displays
The detectability of headtracker latency in virtual audio displays
复制标题
虚拟音频显示中头部追踪器延迟的可检测性
DOI：
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发表时间：
2005
期刊：
影响因子：
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通讯作者：
A. Kordik
中科院分区：
文献类型：
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作者：
D. Brungart;B. Simpson;A. Kordik
在交互式虚拟音频显示设计中，一个关键的工程参数是听者头部移动与呈现给听者耳朵的空间音频信号相应变化之间可容忍的最大延迟量。在这项研究中，使用虚拟音频显示的受试者被要求检测显示系统具有最低可能延迟值（11.7毫秒）的控制刺激与人工增加头部追踪器延迟（范围从36毫秒到203毫秒）的测试刺激之间的差异。在只有单个虚拟声源的标准聆听配置中，结果表明，普通听者无法可靠地检测到小于80毫秒的头部追踪器延迟，即使是听力最好的听者也无法检测到小于60毫秒的变化。然而，在目标信号的相同位置添加低延迟参考音可使延迟检测的最小阈值降低约25毫秒。这一结果表明，增强现实系统可能需要小于30毫秒的头部追踪器延迟，以确保在所有聆听环境中所有用户都无法察觉延迟。
A critical engineering parameter in the design of interactive virtual audio displays is the maximum amount of latency that can be tolerated between the movement of the listener’s head and the corresponding change in the spatial audio signal presented to the listener’s ears. In this study, subjects using a virtual audio display were asked to detect the difference between a control stimulus that had the lowest possible latency value for the display system (11.7 ms) and a test stimulus that had an artificially increased headtracker latency ranging from 36 to 203 ms. In a standard listening configuration with only a single virtual sound source, the results show that typical listeners are unable to reliably detect the presence of headtracker latencies smaller than 80 ms, and that even the best listeners are unable to detect changes smaller than 60 ms. However, the addition of low-latency reference tone at the same location of the target signal decreases the minimum threshold for latency detection by about 25 ms. This result suggests that augmented reality systems may require headtracker latencies smaller than 30 ms to ensure the delays are undetectable to all users in all listening environments.