The ability description is as follows.
Upon initial use of barbarian rage, enemies in a gargantuan radius take sonic damage equal to 2dX, where X is equal the amount of barbarian levels. Then those enemies must make a will save VS sonic with a DC equal to 10 + Y, where Y is the barbarian's intimidate skill divided by 3 rounded down. If they fail, they are dazed for 1dX rounds, then deafened for 1dX rounds, rolled separately. Already deafened foes are not afflicted by these effects.
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The damage works as intended, the deafness works as intended but the Daze is neither rolled for nor applied.
I assume it is because deafness is rolled first and they are then immune to the daze effect as the sonic damage is applied before deafness is rolled for, but I could be wrong.
That being said, the ability is probably good enough even without the daze effect but if that is what is done going forward the write-up should be amended.