Hi John. My voice changed too. I'm almost six months out now and it varies. Starting from the same point you did (6 wks out) it changed and for a while it was consistently deeper and then I thought it was going to change back to normal, but now some days it's normal, other days it's deeper than normal. One of the many wonderous after affects of raditaion to the neck.

-Brett

Base of Tongue SCC. Stage IV, T1N2bM0. Diagnosed 25 July 2003.
Treated with 6 weeks induction chemo -- Taxol & Carboplatin once a week followed with 30 fractions IMRT, 10 fields per fraction over 6 more weeks. Recurrence October 2005.