Curse song

Is there any defence from it?
I tried Wand of Silence, Blindness/Deafness wand, but it had no effect on me....

If you're deafened, you cant hear it - but theirs no real defense from it.

Okay. How can I get deafened? Guess I can't do it myself...
So like...ask a mage/cleríc to cast it on me?

Most likely - keep in mind that if you do, and restore, you'll restore the deafenedness. ^_^

Nwn wiki:
Lesser Restoration

Description: Removes all magical, extraordinary, and supernatural effects that apply a penalty to ability scores, armor class, attack and damage rolls, spell resistance, and saving throws. This spell will not remove the effects of a curse or a disease.

So as long as I use lesser restor, I get rid of being crippled, and deafness should remain, right?

Yeah.