Sounds/activities you can minimize or eliminate to ensure a good piano tuning include:

TV
Radio
Running water
ANYTHING in the kitchen
Lawn mowing
Washing machine
Dryer
Noises from babies/children
Ceiling fans
Talking
Singing
Parties

“Parties?!” you ask? Yes, it’s true… we have actually been asked to tune a piano during a party.
(Obviously, there is no possible way to assure satisfaction in such a situation.)

The less ambient noise there is, the better your tuning will be.