Is it normal or common after having turbinate reduction to have changes in the voice? More like a hoarness.

Hi metoonow and thank you for your question.
Hoarseness after surgery is a common complaint due to intubation and irritation of the voice box. Many times turbinate reduction surgery is done under general anesthesia with intubation. I'm not sure how this procedure was performed for you, but I would supposed that if you were intubated, then the hoarseness is potentially coming from that. For persistent hoarseness, a head and neck surgeon can take a look at your voice box to examine the cause of your hoarseness.
Good luck!