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    Auditory navigation performance is affected by waypoint capture radius

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    WalkerLindsay2004a.pdf (989.6Kb)
    Date
    2004-07
    Author
    Lindsay, Jeff.
    Walker, Bruce N.
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    Abstract
    Non-speech audio navigation systems can be very effective mobility aids for persons with either temporary or permanent vision loss. Sound design has certainly been shown to be important in such devices [e.g. 1]. In this study we consider the added factor of capture radius. The capture radius of an auditory beacon is defined as the range at which the system considers a user to have reached the waypoint where the beacon is located. 108 participants successfully navigated paths through a virtual world using only nonspeech beacon cues. Performance differed across the capture radius conditions. Further, there was a speed-accuracy tradeoff, which complicates the design decision process. Implications of these results for the design of auditory navigation aids are discussed, as are other ongoing and future studies.
    URI
    http://hdl.handle.net/1853/50829
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