Of course it fucking does you plonker.
If you define sound as wavelike movement of air within a certain range of frequencies, then of course the movement exists whether there is an observer or not.
(You could define sound as perception of audio waves by a human being, and in that case the sound does not exist if nobody is there to percieve the air movement. But the philosophers I heard talking about this did not do that simple thing of defining what they meant by sound. They just played with words. A History Of Ideas is a BBC Radio podcast)