Not even a dismissive grunt. Dick smirked, listening to the sound of Damian shuffling around in the narrow space. He was used to having his chatter met with silence from Batman. But even when there were no responses, he knew that the two were always listening. Their training didn't allow them to not.
There were voices starting to float down the vents as well. At first just indistinct murmuring, but slowly becoming more apparent of three thugs talking.
"-after a guy has undergone that much torture, I'm just saying you can't rely on what comes outta his mouth. No matter how many teeth we've pulled from it."
"Dun care, Muggy. Keep at it. Get back down to the showers and wake him back up. Get everythin' ya can 'fore he bleeds out. Unless your guts too thin?"
"Ain't that. I got no problem making our competition talk. I'm arguin' reliability, here."
Dick could only hear a murmur or this, unable to make out the words through Damian's com at all. He was keeping quiet though so Damian could focus on being stealthy.