well just to throw you all off the ball , i would try tyres
i was there for months took it to loads of garages, mot all passed and said it must be me as the bearings are fine
my unle then closely inspected the tyres and was the rears slightly out of shape ,
i swapped front to back and the noise moved so it was the tyres - in my case anyways
Interesting that and definately worth a try but would the noise stop under braking?
and as for wife stopping moaning when braking its because shes bracing herself (shiting it ) lol
My 'wifeymoan' tends to get a bit louder and higher pitched under heavy breaking but funnily enough it's at it's loudest under acceleration, especially when the kids all shout, 'TURRRRBOOOOOOOOOOOO!!!!!!!!'