Not specifically, but I do remember a piece of open source called 'Peep' a 'Network Auralizer' (!).

It looked at the network traffic and depending on what it saw it would generate sounds - so you could use hearing to determine how much traffic was going on - very cool, but also highly annoying.

I'll see if I can dig out a link..

*edit* Here it is: http://peep.sourceforge.net/doc.html

Paul