My son has found his voice and it is getting increasingly louder! We discovered that the most effective way to dissipate his frustration or tantrum is to acknowledge what he says by imitating his gibberish in volume and action. Yes, it may sound childish, but by doing so, he quiets down very quickly. Often times, he finds it quite amusing. We think the imitation tells him we understand what he is saying. We can then quickly figure out what is wrong and soothe him effectively.
As for biting and pulling hair (I have bangs only on my left side from his pulling)... he bites when he's teething and he pulls hair when he's hungry... So we finally gave 'breastmilk' a name... the hair pulling has definitely subsided!