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Exceptional ability of blind humans to hear sound motion: Implications for the emergence of auditory space

机译：盲人具有出色的听觉声音运动能力：对听觉空间出现的影响

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Blind people may compensate for their visual loss by the increased use of auditory spatial information, thus showing normal or even supra-normal ability to localize sources of sound. However, the problem of how blind persons develop and maintain an internal concept of the topography of the auditory space in the absence of calibration by visual information is still unsolved. The present study demonstrated a substantial superiority of blind subjects in perception of auditory motion: The minimum audible movement angle of blind subjects (mean 3??) was about half the value found in matched sighted controls, whereas no such advantage was demonstrable for localization of stationary sound. There were no significant differences between early or congenitally blind subjects and late blind subjects, suggesting that long-term visual deprivation per se, independently of the point in time of its onset, was relevant for the superiority in auditory motion perception. The results were compatible with the hypothesis that in the absence of visual input the calibration of the auditory space is performed by audiomotor feedback, that is, by the evaluation of systematic changes of auditory spatial cues resulting from head and body movements. It is reasonable to assume that with blindness the neuronal circuits specifically concerned with the analysis of auditory motion are more intensely trained than in sighted people. It seems possible that the higher demand of motion analysis associated with blindness is related to processes of reorganization in the brain, as have been previously reported to occur also in areas known to be involved in auditory and/or visual motion analysis in sighted persons. ? 2012 Elsevier Ltd.
机译：盲人可能会通过增加使用听觉空间信息来弥补他们的视力丧失，从而显示出正常甚至超常的定位声源的能力。然而，在没有通过视觉信息进行校准的情况下，盲人如何发展和保持听觉空间的形貌的内部概念的问题仍然没有解决。本研究证明了盲人在听觉运动感知方面的显着优越性：盲人的最小可听运动角（平均3θ）约为相匹配的有视力对照者的一半，而这种优势在本地化的视听者中没有表现出来。平稳的声音。早期或先天盲人与晚期盲人之间没有显着差异，这表明长期的视觉剥夺本身与发作时的时间点无关，与听觉运动感知的优越性有关。该结果与以下假设相吻合：在没有视觉输入的情况下，听觉空间的校准是通过音频运动反馈来执行的，即通过评估由头部和身体运动引起的听觉空间提示的系统变化来进行。可以合理地假设，与视力障碍者相比，失明的神经元回路与听觉运动分析特别相关。与失明相关的运动分析的更高需求似乎与大脑的重组过程有关，正如先前已经报道的那样，在已知涉及视力人员的听觉和/或视觉运动分析的区域中也会发生这种情况。 ？ 2012爱思唯尔有限公司

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