Ah. I reckon if it's a tired sign then that's preferable to it being a tanty noise. I would try to ignore/distract and use calming sounds like shhhhhh-ing and singing quiet songs (my fave "calm down, you freak!" song is that haydee, haydee-ho, the great big elephant is so slow... etc. Is engaging without being too stimulating.
Hope this phase is short-lived.