He does hear it, and his first thought is to be terrified. It's like something is in his head again. Like someone. And the first thing she gets in response is a tangled mess of computerized thought forms and a sensation of disruption and pain.

He screeches and folds forward, grasping at the plug in the back of his head, like he's trying to tear something out of them. They're all empty. He's unattached. But he can stop clawing at them, trying to dislodge whatever's gotten in his head.