macbook pro makes repeating "error" alert sound
Hi, my MacBook Pro randomly began making a constantly repeating error sound, like when you press a wrong key or command on your computer. This sound just started when i booted up my MacBook Pro this morning, and is only not audible when I mute the computer (logically). I tried to see if any keys of my keyboard were stuck, and that doesn't seem to be the case. Also, after first noticing the problem, I proceeded to update the OS to 10.9.2 (from 10.9 or 10.9.1, don't exactly remember) and after the whole reboot, the problem still persists. Any thoughts on what the problem could be and how I could fix it? Thanks
MacBook Pro, OS X Mavericks (10.9.2)