User blog comment:Stevethebarbarian/Theoretical Question/@comment-26066818-20151211152817

Klaw has the ability to absorb sound and vibration for his own use. When he's weak, he can absorb all the sound from his environment to recharge himself (creating zones of total silence). When he creates a sonic force field, Ben Grimm once demonstrated that pounding loudly on the field only reinforced it with additional sound and vibration. To penetrate the field, the Thing quietly pushed on a single area of the field, using pressure instead of vibration.

So Klaw could theoretically absorb the shockwave produced by Black Bolt's voice. The only issue would be whether Klaw has an upper limit to the amount of energy he can absorb at a time, and if Black Bolt's voice exceeds that amount. I'd bet it does.