A lot of the issues with measurements are knowing what and how to measure, and how to interpret the results. I spent maybe a decade or two doing various sound things quite a while ago, and learned that engineers do not know it all but can measure most of it, and audiophiles know some but measure almost nothing. I have measured significant differences that nobody could find in a DBT, and now and then listening tests have led to new measurements and/or techniques that have found New Things in audio. However, in my experience there are far more things claimed as audible than actually found in e.g. DBT. I have more often found I can measure things that are not heard, like ps jitter and spurs < -100 dBc, phase noise < - 115 dBm/Hz, etc.
And sometimes correlating measurements to hearing is not straightforward, particularly when things interact in ways perhaps not seen in the lab. Examples include phono cartridge/preamp interaction, amp/speaker interactions and room/speaker interactions -- I am sure anybody here can generate a long list of similar cases. Guess you can add "where" to "what" and "how"...
My 0.000001 cents - Don
And sometimes correlating measurements to hearing is not straightforward, particularly when things interact in ways perhaps not seen in the lab. Examples include phono cartridge/preamp interaction, amp/speaker interactions and room/speaker interactions -- I am sure anybody here can generate a long list of similar cases. Guess you can add "where" to "what" and "how"...
My 0.000001 cents - Don