i've a 13 inch macbook pro 2.4 ghz C2D, the april 2010 model. it was fine till today morning, wen suddenly it started making annoying alert sounds, every time i press a key on the keyboard..the trackpad does not make the sound though...and as far as i kno, i haven't installed any application that's causing this sound, cuz i didn't install any today morning....i set it up to connect to the wifi at my college...

the sound's really annoying, i mean, i had to mute it to type this!

any help would be appreciated

thanks

i just turned down the alert volume..but now, if i empty the trash, there's no sound..till yesterday, evrything was fine...