Ultrasonic clothes dryer 'halves drying time'
tumble dryer that is claimed to dry clothes twice as fast has been developed in the US.
The machine uses high-frequency sound waves instead of heat to dry laundry.
As well as speeding up the drying process, it is expected to use up to 70% less energy than conventional dryers.
The dryer has been developed by scientists at Oak Ridge National Laboratory, Tennessee, in partnership with General Electric.
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