White unibody makes burping frog sound.

[Germel]

My 2 months old White Unibody Macbook makes sometimes this odd burping sound. You could almost tell theres a frog inside my macbook.

I checked the sound in preferences but none of it sounds like mine does.

It comes every now and then and sometimes every 10 seconds.
I can hear it also through my earphones once i wear them.

Does someone know what is causing it to burp?

 

[Collin Bl]

Do you think it may be this selection - try changing this setting to something else to see if sound changes


Click for full size

 

[chas_m]

As for WHY you are hearing it -- it's because some program you have running in the background is trying to do something it's not allowed to do. It's an "error" alert.