I know they do this for mating but he makes an odd coughing or puffing sound. I do not own any other beardies btw https://youtu.be/UYZBUruY_2g it’s quiet so turn up sound thanks
Since you just got him he's stressed + nervous. He's in a new place + his world as he knew it has completely changed, like as if you just moved to a new town but had no idea until you were driven there with no explanation. Give him some time to get used to you + let him stay in the tank most of the time.