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How well can you see with your ears? Device offers new alternative to blind people

Date:
July 8, 2013
Source:
Frontiers
Summary:
A device that trains the brain to turn sounds into images could be used as an alternative to invasive treatment for blind and partially-sighted people, researchers have found.

This is a participant wearing camera glasses and listening to the soundscape from the camera's view of the optotype displayed.
Credit: Alastair Haigh, David J. Brown, Peter Meijer and Michael J. Proulx How well do you see what you hear? The acuity of visual-to-auditory sensory substitution. http://www.frontiersin.org/Cognitive_Science/10.3389/fpsyg.2013.00330/abstract; CC license

A device that trains the brain to turn sounds into images could be used as an alternative to invasive treatment for blind and partially-sighted people, researchers at the University of Bath have found.

The vOICe sensory substitution device is a revolutionary tool that helps blind people to use sounds to build an image in their minds of the things around them.

A research team, led by Dr Michael Proulx, from the University's Department of Psychology, looked at how blindfolded sighted participants responded to an eye test using the device.

They were asked to perform a standard eye chart test called the Snellen Tumbling E test, which asked participants to view the letter E turned in four different directions and in various sizes. Normal, best-corrected visual acuity is considered 20/20, calculated in terms of the distance (in feet) and the size of the E on the eye chart.

The participants, even without any training in the use of the device, were able to perform the best performance possible, nearly 20/400. This limit appears to be the highest resolution currently possible with the ever-improving technology.

Dr Michael Proulx said: "This level of visual performance exceeds that of the current invasive techniques for vision restoration, such as stem cell implants and retinal prostheses after extensive training.

"A recent study found successful vision at a level of 20/800 after the use of stem cells. Although this might improve with time and provide the literal sensation of sight, the affordable and non-invasive nature of The vOICe provides another option.

"Sensory substitution devices are not only an alternative, but might also be best employed in combination with such invasive techniques to train the brain to see again or for the first time."


Story Source:

The above story is based on materials provided by Frontiers. Note: Materials may be edited for content and length.


Journal Reference:

  1. Alastair Haigh, David J. Brown, Peter Meijer, Michael J. Proulx. How well do you see what you hear? The acuity of visual-to-auditory sensory substitution. Frontiers in Psychology, 2013; 4 DOI: 10.3389/fpsyg.2013.00330

Cite This Page:

Frontiers. "How well can you see with your ears? Device offers new alternative to blind people." ScienceDaily. ScienceDaily, 8 July 2013. <www.sciencedaily.com/releases/2013/07/130708115139.htm>.
Frontiers. (2013, July 8). How well can you see with your ears? Device offers new alternative to blind people. ScienceDaily. Retrieved July 22, 2014 from www.sciencedaily.com/releases/2013/07/130708115139.htm
Frontiers. "How well can you see with your ears? Device offers new alternative to blind people." ScienceDaily. www.sciencedaily.com/releases/2013/07/130708115139.htm (accessed July 22, 2014).

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