Although sound thresholds vary person to person and there are very real limitations for every human ear, the most significant factor for listening pleasures is and always will be the amount of distortions that induce sonic harm into the presentation.
For example, one of the most (but not the most) serious forms of distortions inducing harm comes from inferior or no AC line conditioning. Even the most fabulous recording played at 82db on a SOTA-level system can drive one from the room after 10 short minutes without proper line conditioning.
Properly addressing this and the other sources of distortion should provide hours of listening pleasure in the 92 - 110 db range.
Obviously, these distortions inducing much sonic harm into the presentation are not something that OSHA and many others take into consideration, but should.
-IMO
For example, one of the most (but not the most) serious forms of distortions inducing harm comes from inferior or no AC line conditioning. Even the most fabulous recording played at 82db on a SOTA-level system can drive one from the room after 10 short minutes without proper line conditioning.
Properly addressing this and the other sources of distortion should provide hours of listening pleasure in the 92 - 110 db range.
Obviously, these distortions inducing much sonic harm into the presentation are not something that OSHA and many others take into consideration, but should.
-IMO