What is the sound level of Your Listening Room?

Interesting. Everyone is so interested in environmental noise. The noise on a record might be 60 dB down if you are lucky. Now , if your turntable is not isolated you can take that environmental noise at say 80 dB down and amplify it with your turntable so it is 40 dB down. Clever. So, if you are really worried about it get a decent isolated turntable or buy yourself a MinusK platform. 
Mike all that stuff is great but it will not save you from the trucks driving down the street. It does sound like your place is out of the way. I Live on a cul-de-sac 1/2 mile from a main street. On my other side is an 18 hole golf course. So, for a house not to far from society I'm pretty quiet. But, noise is never a problem for me. Maybe I listen louder than most but for whatever reason noise is never an issue. Fortunately our brains can only pay attention to the loudest noise. If the noise is over 30dB down you will never hear it.  

now…..run the RTA……

how many db down is the subway sound in the various famous Carnegie hall analog recordings….hint…> 30

of course, maybe some systems / ears cant resolve the …noise…

Why introduce your own ?

Okay some of you, I worked in a recording studio. I made a dB meter when I was 13 and it was calibrated to an NIST standard as my uncle worked for NIST. I don't dispute your list of sound levels. Some of the dB reading you guys are quoting must be "L" weighted. BTW "shouting in the ear" is way higher than 110dB!

fiesta75, yes, I was thinking the same thing. 7 is imo not attainable in a domestic environment. Recording studios are doing well to be under 20dB.  

mijostyn, Have you experienced what a room with reduced environmental noise does for the listening? Obviously, reducing source noise is advantageous, but irrelevant to this discussion. 

The genre of music played is absolutely associated with this topic. If you listen to music that has quiet or silent passages, guess what? You can hear environmental noise if your system doesn't intrude with its own noise. Those in normal domestic environments will have little appreciation of that variable.  

For instance, the start of Shelby Lynn's "Just A Little Lovin'" begins with a field of silence into which individual drum and cymbal strikes repeat. I assure you that a deeply depressed ambient noise field changes the musical perception radically. Any ambient noise, from an AC unit to an appliance motor running, etc. intrudes obnoxiously. At about 2:45 there is a pregnant pause as the instrumentation fades until almost silence. Again, if there is ambient noise of any degree in the room, it will sound like utter intrusion. Perhaps that is not your preference of genre of music, but simply because it is not important to you doesn't mean it's not an issue/consideration for other hobbyists.  :)