A prototype vibrating vest which could change the way deaf people understand speech by creating a new route to the brain, has been developed by researchers at Baylor College of Medicine in Texas.

The device works on the concept of sensory substitution - finding alternative ways for one sense to be experienced by another - and is fitted with a series of mobile phone motors which vibrate in specific patterns depending on what is being heard.

BBC Click's Jen Copestake reports.

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