How do I fix Miata hardtop wind noise?

My hardtop sits a little bit proud of the windshield header. At freeway speeds it causes a fair amount of wind noise and a Miata is noisy enough. Is there any way to adjust the leading edge to make it sit a tiny bit lower? can the latches be causing the edge to bow up?

Consistent gap or does the hardtop have a different arc? Seal condition? Factory top?

Hmm, bad top lock caps could pull the top forward and cause it to ride up. What do they look like?

is there a DB noise meter you can buy on Amazon  that can help you  track down wind noise ?

something you or  a passenger  can check while driving at speed ,  checking where the wind noise is coming from , 

mostly for window rubber / door seal rubber.

Thanks 

In reply to Keith Tanner :

Factory top, seals all look good and are nice and pliable. Top appears to have slightly more curvature than the header, it sits flush near both latches. I'll take a look at the latches in the morning to see if they might be causing it to ride up on the header.

In reply to DeadSkunk (Warren) :

I'm pretty sure it's coming from the center of the top. I can make it worse by pushing upward at the front edge of the top while driving.

If it's bowed up in the center, I wonder if you can move the latches or strikers slightly further apart. It's not something I've come across, but the plastic hardtop probably isn't as stiff as the steel ragtop header. 

If you're using the factory latches, adjust them tighter. They adjust the same as the soft top latches. It made a ton of difference on mine. Before adjustment the hard-top was louder at freeway speeds than the soft top.

In reply to ToManyProjects :

Check the condition of the top lock caps first and replace if they're eroded. Then adjust. 

Well, the latch caps look fine. The rubber seal sits up between the top and the header at both ends, but sinks down a bit in the middle, suggesting I may need a new header rubber. It doesn't leak water , which is a good thing.

If your soft top fits okay, I'd be looking at the hardtop itself. Latches too close together or maladjusted, some sort of deformation from overheating while off the car (I'm making that one up as a theoretical possibility, I've never heard of it), something like that.