Irregular sounds on new 50mm wheels at speeds over 16mph
Generally speaking, the deeper the rim the more noise the wheel makes. A pronounced whooshing noise isn't unusual among deep dish wheels and disc wheels (as in the solid wheels, not the brakes) are even noisier. I had Cinelli and Hed discs when I raced and used to love the sound of them (the ride, not so much!)

I would personally be very nervous of the no brand Chinese carbon wheels, frames and parts being sold on eBay. I've been hearing some absolute horror stories from shops and race mechanics.