Therefore you don't have to carry an additional document along, since the functional test contains as precise a specification as there can be. This will happen until the whole team is up to speed. It is like walking with one leg tied to your colleagues leg. Usually, it takes about 2 months to bring the whole team up to speed with pair programming. People are communicating.
Quite teams are a bad sign.
Headphones in particular. You will have to make some re-arrangements of your office which makes you feel comfortable.