It can often be tricky to find a pair of earphones that fit in the ears without either falling out or being too big to fit in the first place.

Spencer Kelly experiments with a device that can make bespoke headphones in minutes.

See more from CES 2012

The big trends of CES 2012

Dual view TV and Kinect 3D scanning

The solar powered laptop for the developing world

The tablet PC that makes a cup of coffee

Headphones 'made to fit in five minutes'

The tablet served up for cooks

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