clicking noise in sinus

I often hear a clicking noise in my sinus when I speak. Its quite loud and I find it annoying and embarrassing. I have year round allergies (dust, mold, pollens) which are reasonably well managed with Nasalcrom. I've never had a sinus infection that I was aware of. I'm wondering
1) what it is
2) can anything be done?

Thanks!

[bio43]

You are moving your soft palate up and down. The sound is not in your sinus cavity.