I am sure there is a better way to do this, but I am working on a linux lab build and the PC speaker beep is annoying me. Really annoying me.
I can only imagine what a lab full of beeping PCs would be like. The quickest way to stop the beeps I found was to unload the pc speaker driver:
modprobe -r pcspkr
If you want to turn it off permanently add a line /etc/modprobe.conf
alias pcspkr off