[citation][nom]tokenz[/nom]wow, or they could just talk with their hands. No moving parts, or batteries to die. Also you wouldnt have to learn a whole new language.[/citation]
If they could understand anyone, not only folks who know hand language, it would be great.
Unfortunately I don't think that four vibrating elements can be used to understand whole spectrum of human language. It's fine fo 'bass line here, treble here, vrroooom vroooom', but nothing more sophisticated..