A groundbreaking device designed to assist people with visual impairments has emerged from the collaborative efforts of students at the Rose-Hulman Institute of Technology (RHIT) and alumnus John Marum. The innovative creation, named AuralVision, employs advanced time-of-flight (ToF) sensors and haptic feedback to aid blind or visually impaired individuals in navigating potential obstacles more independently.
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Marum, who founded AuralVision as a nonprofit organisation, conceived the device following an observation of the functionality of ToF sensors in airport facilities. These sensors are capable of gauging the distance to objects, and Marum envisaged how they might be repurposed to assist individuals who cannot see. “I began to think about how it would be possible to use that same sensor to measure distance to objects and relate that distance to someone who can’t see, and then alert them to objects in front of them,” he explained.
Initially, the device was designed in the form of glasses featuring ToF sensors and audio guidance through headphones. However, feedback from actual users prompted a significant design shift. According to Marum, two testers with visual impairments indicated that a baseball cap would be a more user-friendly option, particularly for outdoor use. This input was invaluable and led to the development of a hat prototype.
The revised iteration of AuralVision employs ToF sensors positioned around the rim of the cap, accompanied by built-in speakers on either side to provide auditory cues. The conceptual model also integrates a microcontroller and an accelerometer, key components for determining the location and movement of the wearer. The entire setup is designed to be mobile and self-contained, allowing it to function without any reliance on internet connectivity or software updates, and offering a battery life of approximately 12 hours.
With this prototype in mind, the design team conducted a focus group at a Terre Haute assisted living facility, gathering insights from elderly participants aged between 70 to 99. The feedback received highlighted potential challenges, particularly concerning the haptic feedback system. While the vibrations are intended to signal nearby obstacles, some participants found them distracting. “We definitely learned we need to think outside our age range when designing products like this,” commented Ethan Powell, a computer engineering student involved in the project.
The focus group uncovered that younger generations may have a different tolerance for sensory information compared to older adults, who may find constant vibrations overwhelming. This insight has led to discussions about refining the feedback mechanism, possibly by varying vibration patterns to cater to the preferences of different age groups.
As the project progresses, the team of students is keen to continue their work on AuralVision. Their aim is not only to improve the device based on user feedback but also to bring it to market. Marum expressed optimism for the future, saying he intends to collaborate further with the students in refining the device and making it accessible to a broader audience.
As these RHIT students approach graduation, they leave behind a legacy of innovation aimed at improving the lives of individuals with visual impairments. Their work embodies a blend of engineering prowess, sensitivity to user needs, and a commitment to enhancing independence for those who are blind or have low vision. With continued development, AuralVision has the potential to revolutionise how visually impaired individuals interact with their surroundings, enabling them to navigate obstacles more effectively and confidently.
As the project unfolds, it not only showcases the ingenuity of young engineers but also highlights the importance of user feedback in the design process, particularly in technologies aimed at enhancing accessibility.