Why do I hear the sounds from outside?

I hear everything going on outside of my headphones all the time eg when I type then I hear the typing or when the laptop rustles I hear the noise through the headphones what is the reason? And no my headphones are not broken

You have to put it on.

Are probably no noise canceling headphones. Is specially made so that you get something from the outside if you e.g. Are on the way.

Either the microphone is still on under Windows or the densities are not well off

Not broken, but your headphones lack the noise canceling function, which is designed to shield all noise from the outside. Many products also offer to switch this function on and off!

I guess that will be recorded through your mic.