To me that sounds like reverse sneezing. My lil guy has a collapsed trachea and his is more raspy, kind of goose honk (not so much), and he hacks at the end. And it happens more in fits/episodes. he is better now but still has little episodes, especially when the weather gets dry and cold (in winter).
Here's a link of how my guy sounded like, he had pneumonia/bronchitis too, and that was the catalyst for his CT. You can best see CT through an x-ray.
http://www.dropshots.com/day.php?userid=217491&cdate=20061211&ctime=144216
CT is hereditary (from what I have been told) if you do a search on YT you'll find TONS and TONS of info as it is common in smaller breeds. There are varying degrees of CT, and so with some you may never know he/she has it.
Also here's another link of more info on CT, it was given to me by another YT'er:
http://www.veterinarypartner.com/Con...=1&SourceID=42
btw .. you're lil one is SO CUTE!! i hope nothing is wrong and it is just reverse sneezing!