Australian scientists maintain the trend to offer health warnings to iPod users.

A report on Sky News claims the researchers believe that one-in-four users of iPods (and other music players) are threatened with tinnitus and other hearing problems because they play their music too loud.

"Sydney's National Acoustic Laboratories found around 25 per cent of those surveyed were listening to their players at volumes similar to small power tools," the report explains.

This is defined as being a volume of 85 decibels or more.

The researchers warn users to turn their volume settings down, or not to listen to their iPods for as long.