Bunduk had an Upper respiratory when he was a kitten and would do exactly that. I think it doesnt sound "normal" cuz theres also mucous in there..so it sounds like a weird cough...I dont know if that makes any sense.
I have heard that sound though, so dont worry. It may just be a hairball but coupled with sneezing (runny eyes?) it may be she has a little cold. Dont worry love4himmies, honestly im 100% sure its nothing serious. A little cold or a little hairball
or maybe the hiccups as ancient said