Does learning a room’s reflections aid spatial hearing?
Does learning a room’s reflections aid spatial hearing?
复制标题
了解房间的反射有助于空间听觉吗？
DOI：
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
F. Menzer
中科院分区：
文献类型：
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作者：
B. Seeber;M. Müller;F. Menzer
声音反射在日常环境中大量存在；然而，我们的空间听觉能力通常不会因此而受损。这种稳健性的一个贡献者是在反复暴露于房间混响后对反射的适应。回声阈值，即反射开始作为回声单独可听的延迟，随着反复暴露于反射模式而增加。事先暴露在房间的声学环境中也对语音理解有好处。在这里，我们研究了学习室内混响模式的特征是否可以提高声音的定位。刺激在模拟开放场环境（v3）的自由场中呈现，这是一种基于扩展镜像源方法的室内声学模拟和听觉工具，具有96个扬声器的听觉。在一个虚拟的房间里，参与者在没有关于这个房间的先验信息的情况下，在一个由房间里出现的两次噪音爆发组成的短时间暴露阶段，或者在一个由14次噪音爆发组成的长时间暴露阶段，定位了听众面前出现的目标噪音爆发。为了传递房间的信息，同时防止与目标刺激位置的干扰，暴露刺激从两侧的随机位置呈现。以均方根误差和标准偏差衡量的定位能力在事先暴露于室内声学后得到提高。结果表明，学习室内声学有助于我们定位室内声源的能力。由于暴露和目标刺激并不共享相同的位置和反射模式，结果也证明了房间内的普遍性，即房间学习的改善可以从一个位置延续到另一个位置。
Sound reflections are abundantly present in everyday environments; yet, our spatial hearing abilities are usually not impaired by them. One contributor to this robustness is the adaptation to the reflections after being repeatedly exposed to the room’s reverberation. The echo threshold, the delay at which a reflection starts being separately audible as an echo, increases with repeated exposure to the reflection pattern. Benefits from prior exposure to a room’s acoustics have also been shown for speech understanding. Here we study if learning the characteristics of the room’s reverberation pattern can improve sound localization. Stimuli were presented in the free-field of the Simulated Open Field Environment (v3), a room acoustics simulation and auralization tool based on the extended mirror-image source method with auralization over 96 loudspeakers. Participants localized target noise bursts presented in the front of the listener in a virtual room either with no prior information about the room, after a short exposure phase consisting of two noise bursts presented in that room, or after a long exposure phase consisting of 14 noise bursts. The exposure stimuli were presented from random locations for each burst at the sides in order to transmit information about the room, but to prevent interference with the target stimulus locations. Localization ability as measured by RMS error and standard deviation was improved after prior exposure to the room acoustics. Results indicate that learning room acoustics can aid our ability to locate sound sources in rooms. Since exposure and target stimuli did not share the same positions and reflection patterns, results also demonstrate a generalization within the room in that the improvement from room learning can carry over from one to another position.
影响因子：
2.4
作者：
Brandewie, Eugene;Zahorik, Pavel
通讯作者：
Zahorik, Pavel