Any phenomenon can be reduced to some set of parameters on a scale this is measured numbers...
For example temperature is a thermodynamical phenomena about molecules dynamic distributions in volume of space reflected at our body scale by the 2 QUALITATIVE polarities related to the sensation "warm" and "cold"...
There is no cold or warm in nature only measured numbers.... We need a conscious finite body with itself an internal thermodynamical distributions of molecules DIFFERENT from the external system which is not finite like our but indefinite relative to our body to speak about "warm or cold"....
Then when we speak of warm or cold we dont speak about a DEFINITE numbers but about a set of different numbers relative to these polarities in us that define our LIMITATIONS and BOUNDARIES...
The human body is itself a measuring apparatus but contrary to our other measuring tools our body react to many parameters combined in many dimensions at the same time and translate that in a "sensation"....
Then what is "audible sensation" for the human ears is itself the expression of a mutiple sets of polarites distributed in many dimensions which are not measured by any of our tools simultenously if they are measurable for now at all...
And anyway even if this is a placebo effect why erasing it?
What good doctor try to erase placebo effect from his drug? In the opposite he reinforce it, saying to his patient that he prays God to make his drug better if he is WISE and not a credulous member of the scientism club...
True scientist use beliefs....They dont erased them by the "law of their faith" like in a cult....
True scientist erase sometimes belief only for the time of an experiment....They are rational without being slave of "reason"....