Closed-back over-the-ear headphones are good for this. Active noise cancellation damps repetitive sounds, but a big hunk of plastic damps everything. I think I

Closed-back over-the-ear headphones are good for this. Active noise cancellation damps repetitive sounds, but a big hunk of plastic damps everything. I think I'm on my third pair of Sennheiser HD280s in 25 years, because the plastic does wear out.