A hum or hiss is better then him talking to his clients *L*
Sheesh .. we made a computer room down in the basement and what room does he always work from ???
The dang dinning room ... Grrrrr
If you do get a hiss or hum (again, not likely), reposition the base unit or try moving it as far from the monitor and tower as possible.
I think you'll be fine, though.