This is an idea I had out of the blue after a friend gave me some broken supercheap headsets. It's a modular microphone that can be magnetically attached to almost any headphone (I like this because I can do gaming with high res headphones and also use them for music. Yes, audiophilic here).

For this you will need:

double sided sticky tape (mine is a kinda gummy soft tape that is just gentle and doesn't damage the surface, I recommend using one like this)

a microphone from a headset (I extracted one from a really cheap headset but you can use an expensive one, if you got the guts)

a headphone cable (preferably a light one, I could also teach how to build one from basic components, comment if you want that tutorial)

4 round shaped neodymium magnets

scissors.

soldering material

shrink tube

insulating tape

super glue