What is the sound level of Your Listening Room?

I moved my room into a concrete bunker in the basement. Within a few seconds the beating of my heart is bugging me, and a few minutes later the blood coursing through my ears is unbearable. I tried meditation to stop my heartbeat, but it was just no use. So now it is a sensory deprivation chamber so effective it takes only about 20 minutes for the hallucinations to kick in.

@millercarbon That is good to hear. I may be pouring the walls to my addition to save me from buying lumber!

i have a room built on concrete, inside another room, inside a barn, 75 feet from my home, in the middle of 5 acres, in the mountains, away from any urban activity.

so zero outside ambient noise comes in. no mechanical systems in the structure to source noise.

my HVAC has it’s air box isolated by rubber and it’s in the attic not above my listening room. there are -3- 90 degree turns in the air vents to the air output. twin outputs and twin returns for high volume, low flow zero noise. the heat exchanger is outside on the opposite side of the barn with three inside walls between it and my room.

when the HVAC cycles on i can hear a soft relay when the music is not playing. that is rare.

it’s quiet. spooky quiet. my signal path gear has very low self noise.

and the inverse is also good; i can go completely crazy at high SPL's and no one can hear it outside the barn.

If it gets too quiet it does get spooky. You can hear the little timers and equipment switching as it comes online. Amazing how loud relays cases warming up and expanding. Junior (the rabbit) calms down.. He's happy to see me.

Trains going by get's me.. Rumble, a heavy semi without air ride too, I hate those.. 1/2 mile of NOISE in every direction.. Delta Pete will transfer noise via ground rumble for a mile.. Trains running on pylons in the delta aren't quiet on the neighbors.. 50 + years it's like a lullaby to me now..

Regards..

Mine is in the low 20’s. I’ll have to give it a try at night. The most important component to my system is my listening room. While in close proximity to a city, three sides are underground with no local traffic. I make sure the air conditioner / heater does not come on… it is controlled by my iPhone… so if it comes on I can turn it off without getting up.
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The listening area is large and irregular making it an incredibly good room. My audio guy says it is one of the two best he has ever heard… and in over thirty years he has heard a lot… many very expensive custom made for high end audio… better to be lucky than good… I sure was.

In answer to your question… for quiet… underground. For acoustic, large and irregular (mine is about 32 x 42.. two offset rectangles).