Changing tracks on digital music players of the future while on the move could be done with the nod of the head.

Building on previous work, researchers at the University of Glasgow have been developing "audio clouds" to control gadgets using movement and sound.

Presenting their work at a US computer interface conference, they say audio clouds could make using mobile devices on the move safer and easier.

A mobile that responds to movements was launched in Japan last month.

Mobile makers are also already testing 3D audio systems for devices.

"The idea behind the whole thing is to look at new ways to present information," Professor Stephen Brewster told the BBC News website.

From bbc.co.uk