Experimental Analysis of a Spatialised Audio Interface for People with Visual Impairments

Experimental Analysis of a Spatialised Audio Interface for People with Visual Impairments
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针对视觉障碍人士的空间化音频接口的实验分析

DOI:
10.1145/3412325
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发表时间:
2020
影响因子:
2.4
通讯作者:
Lock J
Lock J
中科院分区:
--
文献类型:
--
作者:
Lock J

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对于许多有严重视力障碍的人来说,声音感知是一项基本技能。本文中介绍的研究是一个正在进行的项目的一部分,该项目旨在创造一种移动引导辅助设备,帮助视力受损的人在未知的室内环境中找到物体。该系统需要一个有效的非视觉界面,并使用骨传导耳机向用户传输音频指令。它已经实现并测试了空间化音频线索,它传达了3D空间中预定义目标的方向。我们通过几个实验对音频界面进行了深入的评估,这些实验涉及大量被蒙住眼睛和有实际视觉障碍的参与者,并分析了我们设计选择的利弊。除了产生与最先进技术相媲美的结果外,我们发现Fitts定律(人类运动的预测模型)提供了一个合适的度量标准,可用于改进和完善未来移动导航辅助设备中音频界面的质量。
Sound perception is a fundamental skill for many people with severe sight impairments. The research presented in this article is part of an ongoing project with the aim to create a mobile guidance aid to help people with vision impairments find objects within an unknown indoor environment. This system requires an effective non-visual interface and uses bone-conduction headphones to transmit audio instructions to the user. It has been implemented and tested with spatialised audio cues, which convey the direction of a predefined target in 3D space. We present an in-depth evaluation of the audio interface with several experiments that involve a large number of participants, both blindfolded and with actual visual impairments, and analyse the pros and cons of our design choices. In addition to producing results comparable to the state-of-the-art, we found that Fitts’s Law (a predictive model for human movement) provides a suitable metric that can be used to improve and refine the quality of the audio interface in future mobile navigation aids.
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