OK, so some initial testing - I d/l a free app on my wifes iPhone 4S and placed the phone the correct way round in the middle of the matt-black section on the top around 1 inch from the very back:
~30db off
~40db on in menu
~48db during TLoU peaking at 50db
No 'jet engines' but fairly loud and I wonder if removing the PS4 from the cabinet has helped, but I guess that's not the point, I don't want my PS4 on top of my cabinet on display I want it hidden away (but I leave the cabinet doors open during play).
I need to play a bit longer on different levels...does anyone remember a particulary noisey section? Either way I don't think ~48db is acceptable (and I know I've had it noisier).
Anyone else tried something like this?