Internet activity alarm app/script?

[Glass]

I require an application that monitors internet activity and when it drops below a certain amount, will sound an alert. Does something like this exist? Or like some script that will execute a command, namely a sound file, when bandwidth drops to a certain level?

 

[Khayman]

This might have what you want
http://www.bandwidthmonitorpro.com/

 

[dubstar]

or check "Cool Tools" on the main page for "Active Ports"