That voice. There was absolutely no way in not recognizing that voice as Jazz's.
Bee's eyes widened as he threw open the door, crying delightedly, "Jazz?? Are you really and truly here? Mikaela told me, of course, but, well I know she'd never lie, just, I hadn't seen you and I was hoping...and you're human as well! Isn't it fantastic? Sort of. The sounds and the smells. OH! And the tastes, they eat the oddest things, don't they? Have you tried pizza? It's great! And it's great to see you!!" After his rambling rant, Bumblebee lurched forward and grabbed Jazz into a mighty hug, smiling ear to ear. He never realized until then just how much he had missed his fellow Autobots.