I needed to find where to hang headphones and noticed that Fantech AC902s Microphone Boom Arm Maz be the right place. So in no time I made hanger model in FreeCad.
Other than 3D printer there is need for one 4mm screw spiral thread screw, 20 to 30mm long. It is used to clamp hook to microphone boom arm and also to give it more strength.
Download model from:
https://www.printables.com/model/804608-headphones-hanger-hook-for-microphone-boom-arm-fan