In 2016 I bought this Chinese trispoke carbon wheel and it was making a very annoying noise. It wasn't coming from the valve as it already had electric tape and there was no space between the hole and valve extender. I tested it without the valve extender and it still made noise if I rotated the wheel with some of my weight on the handlebar. I also rotated the wheel without weight as you can see at the beginning of the video and there was no noise. This ruled out having small carbon debris inside the spokes. I suspect the hub or bearings were the main reason...

After contacting the shop directly, they were kind enough to send a new hub and bearings but after a couple of rides, the sound came back. Another hub and bearings and the same result. They ended up sending a new wheel  without charging me a penny and finally the noise went away! Probably the first wheel had an offset error and it ended up deforming the bearings. Even though it was kinda stressful, I did not expect to get such great care from a Chinese…