So, I’m unclear on the outcome measures. Some sort of shift in the power spectral density? E.g., play all 5 strings 10 times and average— then blast with sound

So, I’m unclear on the outcome measures. Some sort of shift in the power spectral density? E.g., play all 5 strings 10 times and average— then blast with sound for extended time (guitar music, single tone, white noise, silence) then repeat measures?