On Mac OS X, I am running Flex Builder (which is basically a customized Eclipse). When I do a Find it beeps if it cannot find the selected text and when it wraps the search to the top.
Is it possible to turn off that beep? I've searched the internet and the preferences pane to no avail.
I managed to bypass Eclipse default "run beep" on windows, by setting setting the "beep" sound to a silent .wav file
You can get rid of it by turning down the alert volume system-wide in the Mac OS sound preferences (Sound -> Sound Effects -> Alert volume).
On Linux you can disable this same (annoying) beep by blacklisting the pcspkr module.
None of these are solutions to the problem, however. To disable alert beeps system-wide is probably not what a person wants to do when they ask how to disable them in one specific application for one specific function.
If my smoke alarm keeps annoying me when I'm cooking then I can disconnect it, but that's probably not the best solution...
Assuming you are running some kind of X Windows derivative, run these two commands from an terminal:
xset b offxset b 0 0 0
You may add these to your .xinitrc or .bashrc to guarantee disabling on each system restart.
来源：https://stackoverflow.com/questions/331757/how-to-turn-off-the-beep-sound-in-eclipse