If it's excessively noisy and you purchased a new product. It may be inherently faulty. So could seek a warranty claim. Or........ A pair of ear defenders, cotton wall in your ears?
Here is a "how to" video that shows fan part #'s. I don't know if they are the same size for the 5232-16P-4KS2E. They were correct for my 5216-16P-4KS2E.