What's the name of the USB-connected sound file so I can delete it?

[Sumpm]

You know that obnoxious *BLOOP* sound that happens every time you plug the phone in to charge? Well, I hate it, have root, and want to delete the sound file, just like I did the shutter sound file. But I don't know which file to delete.

Edit: I'll answer my own question. The file is in /system/media/audio/ui and is called Charger_Connection.ogg.

Rename it to Charger_Connection.ogg.bak and you don't have to delete it. Worked like a charm.