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New array measures vibrations across skin may help engineers design tactile displays
Date:6/13/2013

indistinguishable in certain parts of the skin. Likewise, two motors spaced a certain distance apart may be differentiable in one area but not another.

"Should I have eight motors, or is four enough that 90 percent of the time, I'll know that when this one's on, it's this one and not that one?" Jones says. "We're answering those sorts of questions in the context of what information you want to present using a device."

Creating a buzz

Jones sees promising applications for wearable tactile displays. In addition to helping drivers navigate, she says tactile stimuli may direct firefighters through burning buildings, or emergency workers through disaster sites. In more mundane scenarios, she says tactile displays may help joggers traverse an unfamiliar city, taking directions from a buzzing wristband, instead of having to look at a smartphone.

Using data from their mechanical and perceptual experiments, Jones' group is designing arrays that can be worn across the back and around the wrist, and is investigating various ways to present vibrations. For example, a row of vibrations activated sequentially from left to right may tell a driver to turn right; a single motor that buzzes with increasing frequency may be a warning to slow down.

"There's a lot of things you can do with these displays that are fairly intuitive in terms of how people respond," Jones says, "which is important because no one's going to spend hours and hours in any application, learning what a signal means."


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Contact: Andrew Carleen
acarleen@mit.edu
617-253-1682
Massachusetts Institute of Technology
Source:Eurekalert

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