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Walker, Bruce N.

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Now showing 1 - 5 of 5
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    Auditory and Head-Up Displays for Eco-Driving Interfaces
    (Georgia Institute of Technology, 2017-06) Shortridge, Woodbury ; Gable, Thomas M. ; Noah, Brittany E. ; Walker, Bruce N.
    Eco-driving describes a strategy for operating a vehicle in a fuel-efficient manner. Current research shows that visual ecodriving interfaces can reduce fuel consumption by shaping motorists’ driving behavior but may hinder safe driving performance. The present study aimed to generate insights and direction for design iterations of auditory eco-driving displays and a potential matching head-up visual display to minimize the negative effects of using purely visual headdown eco-driving displays. Experiment 1 used a sound cardsorting task to establish mapping, scaling, and polarity of acoustic parameters for auditory eco-driving interfaces. Surveys following each sorting task determined preferences for the auditory display types. Experiment 2 was a sorting task to investigate design parameters of visual icons that are to be paired with these auditory displays. Surveys following each task revealed preferences for the displays. The results facilitated the design of intuitive interface prototypes for an auditory and matching head-up eco-driving display that can be compared to each other.
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    Spindex and Spearcons in Mandarin: Auditory Menu Enhancements Successful in a Tonal Language
    (Georgia Institute of Technology, 2017-06) Gable, Thomas M. ; Tomlinson, Brianna ; Cantrell, Stanley ; Walker, Bruce N.
    Auditory displays have been used extensively to enhance visual menus across diverse settings for various reasons. While standard auditory displays can be effective and help users across these settings, standard auditory displays often consist of text to speech cues, which can be time intensive to use. Advanced auditory cues including spindex and spearcon cues have been developed to help address this slow feedback issue. While these cues are most often used in English, they have also been applied to other languages, but research on using them in tonal languages, which may affect the ability to use them, is lacking. The current research investigated the use of spindex and spearcon cues in Mandarin, to determine their effectiveness in a tonal language. The results suggest that the cues can be effectively applied and used in a tonal language by untrained novices. This opens the door to future use of the cues in languages that reach a large portion of the world’s population.
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    Introducing Multimodal Sliding Index: Qualitative Feedback, Perceived Workload, and Driving Performance with an Auditory Enhanced Menu Navigation Method
    (Georgia Institute of Technology, 2017-06) Sardesai, Ruta R. ; Gable, Thomas M. ; Walker, Bruce N.
    Using auditory menus on a mobile device has been studied in depth with standard flicking, as well as wheeling and tapping interactions. Here, we introduce and evaluate a new type of interaction with auditory menus, intended to speed up movement through a list. This multimodal “sliding index” was compared to use of the standard flicking interaction on a phone, while the user was also engaged in a driving task. The sliding index was found to require less mental workload than flicking. What’s more, the way participants used the sliding index technique modulated their preferences, including their reactions to the presence of audio cues. Follow-on work should study how sliding index use evolves with practice.
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    Prototype Auditory Displays for a Fuel Efficiency Driver Interface
    (Georgia Institute of Technology, 2014-06) Nees, Michael A. ; Gable, Thomas M. ; Jeon, Myounghoon ; Walker, Bruce N.
    We describe work-in-progress prototypes of auditory displays for fuel efficiency driver interfaces (FEDIs). Although research has established that feedback from FEDIs can have a positive impact on driver behaviors associated with fuel economy, the impact of FEDIs on driver distraction has not been established. Visual displays may be problematic for providing this feedback; it is precisely during fuel-consuming behaviors that drivers should not divert attention away from the driving task. Auditory displays offer a viable alternative to visual displays for communicating information about fuel economy to the driver without introducing visual distraction.
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    A sonification of Kepler space telescope star data
    (Georgia Institute of Technology, 2012-06) Winton, Riley J. ; Gable, Thomas M. ; Schuett, Jonathan ; Walker, Bruce N.
    A performing artist group interested in including a sonification of star data from NASA’s Kepler space telescope in their next album release approached the Georgia Tech Sonification Lab for assistance in the process. The artists had few constraints for the authors other than wanting the end product to be true to the data, and a musically appealing “heavenly” sound. Several sonifications of the data were created using various techniques, each resulting in a different sounding representation of the Kepler data. The details of this process are discussed in this poster. Ultimately, the researchers were able to produce the desired sounds via sound synthesis, and the artists plan to incorporate them into their next album release.