Continue the list:
A GOLDEN EAR TEST.
...for a perfect and sensible ear(s) that able to hear .1dB differences:
1. Eat a bowl of grean pea soup with smoked chops of pork turkey or beef.
2. Play a critical recording you're intended to judge a system performance.
3. Pass some gas during an auditioning(preferably quiet especially for those who has a microphonic tube equipment so you won't interrupt a listening test)...
In result you should hear sonic changes of more than 0.1dB(not realy sure if worse or better) as the air pushed by the speaker has some content of impurities that somewhat change the air dencity and thus vary the room accoustics.
A GOLDEN EAR TEST.
...for a perfect and sensible ear(s) that able to hear .1dB differences:
1. Eat a bowl of grean pea soup with smoked chops of pork turkey or beef.
2. Play a critical recording you're intended to judge a system performance.
3. Pass some gas during an auditioning(preferably quiet especially for those who has a microphonic tube equipment so you won't interrupt a listening test)...
In result you should hear sonic changes of more than 0.1dB(not realy sure if worse or better) as the air pushed by the speaker has some content of impurities that somewhat change the air dencity and thus vary the room accoustics.