Ry87TII

How do you know if you have compressor surge?? I have a greddy type rs bov and have been hearing alot of things that when a bov has that flutter sound when it goes off then that is actually compressor surge and it sould not flutter. Can you tell something like that by the sound?? Is there a sound that you dont want to hear the bov make?? Should I be concerned if mine has a bit of a flutter sound??