Noise emission (level and time per day)

Dear robot farmers,
what type and level of noise does a farmbot emit?
I an considering to install a FB next to the terrasse (since on top of the garage is high effort and other places would not be an option), but my wife and I are sceptical about the noise?
I do not think it is really noisy, but even lower noise can be annoying, like a mawing robot.
For how many hours a day does the robot work (per square meter or per 10 square meters)?