That new sound is one of the biggest piles of garbage I've ever heard. Even the 2004 dvd version sounds better than that, and that one was pretty cruddy its own self.
It might not be a bad effect for some other movie, with an entirely different context, but for this? Epic fail x 1000.
The old effect sounds like a beast, and the novelisation says that Ben had imitated a krayt dragon, which is supposed to be a large and fierce but rare creature inhabiting the wastelands. (The skeleton C-3PO encounters near the beginning belongs to a krayt dragon.) Even the sand people were obviously pretty terrified of them, and it makes much more sense for a such a thing to make a booming howl than an echoing whistle, or sound like some douche on crack in the case of the new one.
I just do not get it. What is their incessant need to keep tampering and fiddling with things that don't need to be fixed? It's like someone who has had a dozen plastic surgeries and is never satisfied, but convinced that the next one will make them the most beautiful person on the planet, and then the next one, and so on ad nauseum. It's ludicrous, and it would be laughable if it weren't so infuriating.