Obstacle Detection Display for Visually Impaired: Coding of Direction, Distance, and Height on a Vibrotactile Waist Band

Erp, J.B.F. van; Kroon, Liselotte; Mioch, Tina; Paul, Katja

doi:10.3389/fict.2017.00023

Cited by 19 publications

(6 citation statements)

References 48 publications

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“…of People with Visual Impairments Studies into the capacity of the tactile working memory are relevant from an applied point of view, or as Bliss et al [17] already mentioned, "The results of the present experiments are relevant to the construction of tactile codes for communication using point stimulation of specific anatomical locations as the information-bearing dimension." Presenting information through localized vibrations is gaining interest as a viable option to reduce the threat of perceptual and cognitive overload, for example, in flying [23] and driving [24] and as display modality in so-called ETAs for users with a visual impairment [25,26]. These devices project objects around the user onto a multipoint tactile display, for instance, worn as a belt around the waist or as a vest covering the torso.…”

Section: Relevance For Technology To Support Independent Orientation and Mobilitymentioning

confidence: 99%

“…However, the presentation of multiple objects and their integration into a coherent spatial picture, for instance, of the layout of obstacles in an environment relies on temporal storage of items in tactile working memory. Practical experience and some more formal evaluations of ETAs for pedestrians who are blind indicate the need to reduce the number of presented objects to prevent information overload, thereby affecting both comfort and walking speed [25,26,[28][29][30]. From this applied perspective, it is important to quantify the capacity of the tactile working memory, not only under ideal laboratory conditions but also in relevant use contexts that may, for instance, involve walking, the presence of (non)informative sounds, and the use of a white cane.…”

Section: Relevance For Technology To Support Independent Orientation and Mobilitymentioning

confidence: 99%

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Tactile Working Memory Capacity of Users Who Are Blind in an Electronic Travel Aid Application with a Vibration Belt

Erp

Paul

Mioch³

2020

ACM Trans. Access. Comput.

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Electronic travel aids (ETAs) can increase the safety and comfort of pedestrians who have a visual impairment by displaying obstacles through a vibrotactile navigation belt. Building a complete picture of relevant obstacles and finding a safe route requires ETA users to integrate vibrotactile cues over time and space in their tactile working memory. Previous research suggests that the sense of touch exhibits a working memory that has characteristics similar to vision and audition. However, the capacity of the tactile working memory and the effects of secondary tasks are still under-researched. We investigated tactile working memory capacity of 14 adolescent participants who are blind in an immediate, whole report recall test. Participants received trials consisting of one to five vibration patterns presented sequentially at different locations on their torso representing obstacles with a direction (vibration location) and distance (vibration pattern). Recall performance was assessed under four conditions: baseline and with distracting background sounds and/or while walking with the long cane. Both walking and ignoring distracting sounds are relevant for everyday use of an ETA and were expected to decrease memory performance. We calculated the 75% correct scores for two memory performance measures: the number of items in a trial (numerosity), and item location and pattern correct. In the baseline condition, the scores were close to ceiling (i.e., 5 items). However, in the presence of distracting sounds and while walking, the scores were reduced to 3.2 items for numerosity and 1.6 items for location and identity correct. We recommend using 2 items as the maximum tactile working memory load in an applied setting unless users are trained and/or can adopt their strategy without unacceptable costs, such as reducing their walking speed.

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Section: Relevance For Technology To Support Independent Orientation and Mobilitymentioning

confidence: 99%

Section: Relevance For Technology To Support Independent Orientation and Mobilitymentioning

confidence: 99%

Tactile Working Memory Capacity of Users Who Are Blind in an Electronic Travel Aid Application with a Vibration Belt

Erp

Paul

Mioch³

2020

ACM Trans. Access. Comput.

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“…Mobile apps and remote controls are the brain-numbing task for the elderly and the disabled [3]. Particularly for visually impaired people, the remote controls that belong to specific home appliances are hard to recognize [4]. It can be done with a significantly more expensive home appliance automation device, which is not affordable by ordinary citizens [5].…”

Section: Introductionmentioning

confidence: 99%

AndroiDuino-Fan: A Speech Recognition Fan-Speed Control System utilizing Filipino Voice Commands

Dioses¹

2020

IJATCSE

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In today's modern world, smart homes are now in demand. The times have now become the thing of the past since, over the last few decades, home automation has gained several milestones and acclaim, mainly limited to sci-fi videos. Compared with days gone by, home automation has brought a whole new definition to life. A controller controlled the devices which can be located at home, such as television, air conditioning, lighting, electric fans, etc. These devices can also be controlled by only one remote control instead of one remote control per system. The problems with this paper solve the problem. Only use an existing Bluetooth transmission with an Arduino and smartphone. The voice recognition using Filipino language was used for automatically controlled the electric fan speed from speed no.1 to speed no. 4. The user makes use of voice commands to perform certain actions. In the testing conducted, the fan speed 1 and 2 obtained 50% accuracy and for speed no.3 and 4 both obtained 100% accuracy. The testing shows a promising result. When it comes to functional testing of the system, the system will function effectively.

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“…The skin covering the torso is capable of precisely encoding information since it contains hundreds of mechanoreceptors [7]. A belt-type display can be worn under a coat without attracting public attention [8]. Therefore, we designed a vibrotactile belt to display precise directional information.…”

Section: Introductionmentioning

confidence: 99%

A vibrotactile belt to display precise directional information for visually impaired

Ouyang

Shao

et al. 2018

IEICE Electron. Express

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This paper presents a vibrotactile belt to display precise directional information for visually impaired. Considering the characteristics of tactile perception, the torso-related transfer function was used to arrange actuators on the belt, and a coding algorithm using vibrotactile funneling illusion was proposed to display precise directional information. A psychophysical experiment was performed to evaluate the validity of the belt in displaying precise directional information. The experimental results indicated that the vibrotactile belt using our proposed coding algorithm achieves a resolution of 7.5 degrees with a high recognition accuracy of up to 91%. The current work provides valuable guidance for the design of vibrotactile navigation aids.

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Obstacle Detection Display for Visually Impaired: Coding of Direction, Distance, and Height on a Vibrotactile Waist Band

Cited by 19 publications

References 48 publications

Tactile Working Memory Capacity of Users Who Are Blind in an Electronic Travel Aid Application with a Vibration Belt

Tactile Working Memory Capacity of Users Who Are Blind in an Electronic Travel Aid Application with a Vibration Belt

AndroiDuino-Fan: A Speech Recognition Fan-Speed Control System utilizing Filipino Voice Commands

A vibrotactile belt to display precise directional information for visually impaired

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