Plumber who can fix noisy pipes

[boblothrope.livejournal.com]

My condo neighbor's shower pipes make a rushing noise that's loud enough to wake me up. I'd like to hire a plumber who can solve this problem.

Can anyone recommend a plumber with this sort of experience? Is this something any plumber would be good at? I'd obviously prefer not to pay to rip open the walls if there won't be any benefit.

Or if you know of an easy do-it-yourself fix, please share it, but I doubt there's much that can be done without putting in some new pipes.