If we speak about audio, and teo__audio spoke about audio, the listening experience is not reducible to an "objective fact" like a fact is a fact for a scientific falsifiable theory; then measurement in the sense of the total reduction of this subjective experience to an objective fact is not possible...Audio experience,listening music, appreciating the distance or the proximity of the audio objective signals with the musical subjective judgement is a totally unique irreducible experience for each consciousness...In audio, hearing is the absolute individually irreducible fact, a fact so absolute for each individual that it cannot be negated or replicated by a theory or by another mind, or another ears... It is what I had understand by what he says...For sure placebo effect or nocebo effect, and illusions of all kind partake of each consciousness also, and there is no measurement that will destroy that, because perception is linked to that in a positive and also negative manner...The esthetic experience of hearing a musical sound is constituted by all that, no objective measure rule the consciousness at the beginning nor at the end...Consciousness reign not science....We must be open for example to explore way to makes the sound experience more pleasing and for that we cannot wait sometimes for the correct engineering measurement procedure if this procedure exist at the times for the precise goal at hand now for us...