White noise?

[Killzone]

Hello, I have been  using wavesurfer to record my custom sounds but when I use them in a game they work fine but after it is done playing the sound you hear (I think it's called white noise) that won't shut off. One of my sounds for example is for a Military police that says "Stop let me see your papers" But after it is over there is all this noise left over.

I don't know what option to use to get rid of this can anyone help me on this ;D

[Killzone]

Stupid me. I figured it out. I was still recording even after I was done talking, so the result was a lot of recording nothing.
Well I guess I can say thanks for nothing LOL ;D