Why no “Break in” period?

even if the only one hearing the change are those with superior hearing like miller carbon or Michael Greene.... if they can hear it.. then it can be measured.  PERIOD.

Our instruments are far more sensitive than even the very best ears on the planet.  

This is science fact.  not opinion.  not rhetoric.  not trying to sell you a solution.

sailboat

we are very good at measuring what we know to measure, but are we aware of all variables that need to be measured...and our understanding of human hearing is really not all that great, so what do we correlate our measurements with...

  Eddie,   Speaking for me only.   i hear small %% differences then in three days it's even better 

How would a High C note, played at 90db measure differently from a High B note, played at 90db, or would they look exactly the same?

Measured with an accu-tuner they would measure different.