At what age does it go away to hear this? I'm in my late 30s and I still hear it. But seemingly none of my co-workers can. I know because once one put a "test

At what age does it go away to hear this? I'm in my late 30s and I still hear it. But seemingly none of my co-workers can. I know because once one put a "test your hearing" website and they all thought it was a sham until I told them to cut it out with the annoying whistle. But I thought by now I would no longer be annoyed by those. Probably I'm less annoyed than before.