I don't think so, Jet. A snort is sort of a bit more vulgar sound, and a bit harsh and with a tinge of rasp to it. A sigh ..well, it's a sigh. Although my search about "nasal sigh" did turn this up:
cyanocobalamin nasal
Generic Name: cyanocobalamin
nasal (
sigh ah no ko BALL ah min)
Brand Names: Nascobal
Otherwise, this being the longest thread and not the nasal sigh thread, I found out that Australia Hwy 1 is the longest national highway in the world. It circumnavigates the entire Australian continent at approximately 9000 miles in length, which is enough to make me let out a nasal sigh.
