As poor Huwg is suffering a buzzing sound that is driving him mad, and SystemBlack says he too has a buzzing sound that he hears, if he stops the clock in his lounge ticking

I began to fear for my hearing as I could hear no such noise. So I closed the patio door,and the door into the hallway and turned on my set. Speakers in mute mode, and moved ever closer to the front of the set, eventually ending up with my ear resting on the screen, total silence.
I then went around both sides of the set, and yes with total silence in the room and the speakers in mute mode, and with my ear in line and eight inches away from the side vents [either side].....I too can hear an ever so faint buzzing/ huming noise.......
Ah but I can hear you say, what if Catch 22 is indeed going deaf, well I'll let you be the judge of that. I hear the "transmitted" sound [not the faint buzzing] on the second bar of the volume indicator.
Being an ex sparky I consider that level of system noise to be expected, however if I could hear a distinct buzzing noise whilst stood in front of the set, I dare say I'd be miffed a bit, but still far from considering the wrist slitting option.