If like me you have been doing sidequests and have not yet done much of the main story you can visit a dragon point called Shearpoint, it has a word wall with all three words to the "throw voice" shout. Of course there is a dragon there but also a powerful undead mage. I was level 25 when I went there and it still took a beating. Drops some pretty good loot aswell.
Remember you need 3 dragon souls to fully unlock the shout.
Location - Northeast of Whiterun and directly north of Fellglow keep.