Of course, there's an explanation for that noise, and a new installment of SciShow provides the answer to why your radiator is so annoying.
But there's also that strange banging noise, as though someone is pounding the pipes with a hammer. There's the standard hissing noise when it's getting going, and the yelps of pain when you lean on it while it's on. If you've ever had an apartment with radiator heat, you know it can be noisy.
