Macbook Pro annoying sound

[william20k]

Hi All, my macbook Pro makes an occasional noise that sounds like hitting on a drum (specifically congas). Or for want for a better description, it is the sound you hear when you eject a memory stick from a windows based computer. Have any of you experienced this and could you provide assistance on how to fix this problem. Thanks

 

[FourCandles]

This is [edit: probably!] one of the System Alerts. You can go to >System Preferences>Sound>Sound Effects and change the Alert volume.