I am not a voice expert but believe that I can say with reasonable assurance that alteration (including chronic inflammation) of any anatomical segment of the upper respiratory tract could potentially alter one’s voice. There are physicians who specialize in voice disorders and you might, after first checking with your ENT physician for a referral, want to visit the following website: http://www.voiceproblem.org/resources/howtofind.php
You might also want to visit the Mayo Clinic Website that describes in great detail, the Mayo approach to voice disorders. http://www.mayoclinic.org/voice-disorders/
I hope this helps.