The role of head movement in the analysis of spatial impression

最近在萨里录音研究所进行的研究开发了一种软件，可以预测感知的房间宽度以及使用位于听众耳朵或假人头部的麦克风进行录音的声源的位置和宽度。该软件在开发家庭影院系统等声音再现系统时很有用，因为它比要求大量听众判断声音更便宜，更快，更准确。然而，我们现在需要研究将该软件应用于测量这些声音再现系统的最佳方法。人类大量使用头部运动来确定声音的来源。这有助于解决一些问题，包括声源是在前面还是后面，以及声源是在上面还是下面。考虑到这一点，如果我们的测量要准确地预测我们在听环绕声系统时听到的声音，我们需要找出：我们做了什么类型的头部运动;如何最好地捕捉耳朵处的信号以考虑这些头部运动;当我们移动头部时，各种物理参数发生变化时，它听起来像什么。通过找到所有这些问题的答案，我们可以开发一种测量技术，以与我们通常收听的方式相关的方式捕获耳朵信号，并且我们可以正确地解释软件的结果。

Recent research carried out at Surrey's Institute of Sound Recording has developed software that can predict the perceived room width and the location and width of sound sources from audio recordings made using microphones positioned in the ears of a listener or a dummy head. This software is useful in the development of sound reproduction systems such as home cinema systems, because it is cheaper, quicker and more accurate than asking a large number of listeners to judge the sound. However, we now need to investigate the best way to apply this software to making measurements of these sound reproduction systems.Humans make great use of head movement to work out where sounds are coming from. This helps to sort out a number of issues, including whether the sound source is in front or behind, and whether the sound source is above or below. Taking this into account, if our measurements are to accurately predict what we hear when we listen to a surround sound system, we need to find out: what type of head movements we make; how best to capture the signals at the ears to take into account these head movements; and what it sounds like when various physical parameters change as we move our heads. By finding answers to all these questions, we can develop a measurement technique that captures the ear signals in a manner that is relevant to the way in which we usually listen, and we can properly interpret the results from the software.