Did a search on the forums for "wheel bearing" and found numerous (many!) posts about cars with the same exact symptoms as I've described. Interesting to see how they described the noise: some a howl, some a groan, some a vibration, some a wail. One poster even mentioned the same 4x4 off-road tire sound that I hear. But all say that it gets progressively worse. I believe the left front wheel bearing is the most likely suspect, as the noise I hear gets worse on right turns.
Thanks again to Kurt and all who replied.
Lee K
