Yes.
There is also a very strict list of permitted headsets. The IT ambassadors, who are not often seen but are at the back of the room, can see on the computer whether the witness has connected with the right headset. If the witnesses don't have the right headset, they aren't even allowed to access the meeting on Zoom. It's the same as for you, by the way. When you are appearing virtually, we always make sure you have the right headset before letting you access the meeting on Zoom.