ethomaz on 18 October 2013
After 10 minutes of operation
PS3: 0.83 sone
PS4: 0.815 sone
After 60 minutes of operation
PS3: 2.1 sone
PS4: 0.83 sone
According to the magazine, a "slight noise" is audible from 40cm (= 15.75 inches) distance.
http://new.livestream.com/accounts/3796398/events/2475845
I can't read German so if anybody can help here 
What I gest in the link:
DS4: 214 g
PS4: 2.76 kg
