help with intermittent buzz noise from laptop speakers

[1115]

I have a dell xpsL502s laptop equipped with jbl audio and waves maxx audio.from time to time I get a momentary buzz noise from laptop speakers.ny known issues?

 

[clutchc]

Might be outside interference. Any florescent lights in the room? When it does it again, take the laptop to another room or outside and see if the noise goes away.