Traditionally, exam rules prohibit headset usage. Simultaneously, Examus does not set/reset exam rules, and Examus team always recommends checking in with your exam organizer on this matter.
In case if headset usage is not allowed:
Unplug your headset (for wired) or disconnect it (for wireless)
Put it aside
If your headset includes the only microphone you have, contact your exam organizer and explain the situation. Then, wait for the organizer’s decision.