In most offices people will talk around you. Sometimes to others, sometimes to themselves. If that triggers your 'severe menal anguish', seek employment somewhere with a dedicated office or working from home.
No. If you must talk to yourself then you should "seek employment somewhere with a dedicated office or work from home" -- if you were so important that your productivity should come at the expense of those around you then you would already have an office.
Most people talk in offices. Many including to themselves. Most people don't have issues with it. You will be happier if you adapt to the world, rather than asking the world to adapt to you.
Since you're new, you should probably read the HN guidelines regarding the types of things to avoid.
