@Enkay78
You are back after "ending" the discussion
No one here claimed ultrasonic waves contribute to sonic quality. In fact many of us here don't believe in such or similar myths.
On your claim that 50+ year old men suffer from hearing loss. Yes it's true. I am one of them.
When I plug in my hearing aids that are calibrated to enhance my lossy ears some components sound harsh.
They measure extremely well, but sound unbearable. Should I buy and listen to them or look elsewhere for a different component?
Or should I take a perfectly measuring SOTA component that "accurately" reproduces sound and add tweaks to it to make it inaccurate?
A large majority of us in this hobby are not binary.
Measurements are relevant, but not the last word.
Subjective listening and opinions are also relevant, again not the last word.
A hobbyist takes both in some ratio and bases his/her decision whether a particular component is a good fit for enjoying music.
If you feel, measurements are the only right way, good for you.
Just don't insist that this method must be followed by everyone else.
And going off tangent, bringing in money/ego/what-not serves no purpose.
People (even hardliners from both camps) will buy what they want as per their budget and preference. I respect that.
People (even hardliners from both camps) may even claim that theirs is the best ever they've heard. I respect that.
Everything in an audio chain can be measured to a reasonable accuracy, even the room.
Even when perfect as per science, our dirty little brains trick us and say "No I don't like this"
Hearing is a sensory perception.
Perception being the operative word.
Cheers,
Raghu