I'm not really sure how to explain this but hope it makes sense.

If you watch a program like 24 which contains split screens, as the window shrinks, there is a sort of whooshing rumble as the window moves and also a sort of clunk when it stops moving.

As the video I'm editing using Adobe Production CS3 includes some sequences with split screens, I'd like to try and emulate what they do on 24. It does seem to make a difference having a subtle background sound as the window moves.

Can anyone tell me where I can get those sort of sounds to include in my video.

Thanks