Hi!
I don't think a simple cold can cause hearing loss , specially at high
frequencies.
In some patients some kind of otitis media may develope during or after
cold or flu but it's not that serious .
If you're having a sudden high frequency hearing loss and tinnitus in one
ear, Go to an Audiologist for a battery test.
You can find them at the yellow pages ( under hearing clinic ) or If you
live in the U.S. check this web site to find an audiologist in your area:
www.asha.org
and If you live in Canada find them at this website: www.caslpa.ca