I've noticed that, at least on my box with Linux Mint 14 with Cinnamon, that there is no audible bell. No sound when you "echo '^g'". No sound when you make a mistake in vi. But there is a sound when you adjust the volume control from the panel. I have "terminal bell" selected in my gnome-terminal profile, but I don't hear the bell even in xterm, so I think the problem is deeper than that.
Is there some way to make the bell character produce an audible result when operating in a terminal window?