The invention of measurements and perception


This is going to be pretty airy-fairy. Sorry.

Let’s talk about how measurements get invented, and how this limits us.

One of the great works of engineering, science, and data is finding signals in the noise. What matters? Why? How much?

My background is in computer science, and a little in electrical engineering. So the question of what to measure to make systems (audio and computer) "better" is always on my mind.

What’s often missing in measurements is "pleasure" or "satisfaction."

I believe in math. I believe in statistics, but I also understand the limitations. That is, we can measure an attribute, like "interrupts per second" or "inflamatory markers" or Total Harmonic Distortion plus noise (THD+N)

However, measuring them, and understanding outcome and desirability are VERY different. Those companies who can do this excel at creating business value. For instance, like it or not, Bose and Harman excel (in their own ways) at finding this out. What some one will pay for, vs. how low a distortion figure is measured is VERY different.

What is my point?

Specs are good, I like specs, I like measurements, and they keep makers from cheating (more or less) but there must be a link between measurements and listener preferences before we can attribute desirability, listener preference, or economic viability.

What is that link? That link is you. That link is you listening in a chair, free of ideas like price, reviews or buzz. That link is you listening for no one but yourself and buying what you want to listen to the most.

E
erik_squires
@erik_squires, since you are a teacher of experimental psychology

Ahem ... no no no, that was not me! :)

@edstrelow This is attempted, but the measurement is not standardized. I routinely see Stereophile publish measurements from an accelerometer taped to the sides of a speaker cabinet.

Best,
E
Oopsy, Daisy, it was brucenitroxpro!

@brucenitroxpro - the questions I asked of erik_squires were intended for you. Can you please respond.

Since you are a teacher of experimental psychology and you do not see that background too much I thought I would ask you, by any chance are you familiar with the now defunct group PEAR 🍐 Princeton Engineering Anomalies Research? Also, how about Rupert Shekdrake, author of Dogs that Know When their Owners are Coming Home? 🐩

By the way, I used to work in submarines and heard some good stories.
I was going to leave this subject alone, feeling we had covered it well enough, but then this appeared in my feed:

https://parttimeaudiophile.com/2019/01/06/border-patrol-dac-revisited-audio-fur/


Lots there I agree with, and I have barely started reading. In particular:

- Perception and a specific measurement are not correlated until they are correlated

- Stereophile has a trend / fashion to sell. Their version of "neutral" is not really neutral.
@erik_squires

If you can find a copy of the Radiotron Designer's Handbook, 3rd Edition (published in the 1930s) its pretty evident that we've known for the last 80 years that the various harmonics are treated very differently by the human ear. Yet somehow after all this time, THD is all we get.
To Hayakawa's maxims-
The word is not the thing
The map is not the territory
The flag is not the nation
Let us add:
The measurement is not the music.
It's correlation as a visually rendered reference so we can see deduce and predict what and how we think sound will behave.
It doesn't explain everything.

All the best,
Nonoise