I can across this a few days ago - supposedly they help mitigate the visual overload by turning some of the visual info into audio. Here's a link to the demo. http://accentus.com/products/go.php I can see how this can be done for one or two extra dimensions to keep track of. But beyond that it would be one major source of irritation
Man oh man, folks just keep coming up w/new and useless ways of presenting the same old information, all in order to squeeze yet another buck out of the suckers. H