Driver breakin period, what’s the science?

How does one tell if anything is really changing over time? If you rely on some kind of test that is dishonest. Why? Because then the question is how can you rely on the test? How can you be sure something there hasn't changed as well? But really, bottom line, who is it that is doing all this relying, anyway? There is no escape here: it is YOU! 

Learn to listen. If you can't hear it, what do you care that others can? If you can hear it, what do you care that others can't?

I don't really care that some people can't hear. My only concern is putting the fact out there that it is possible. How far they go with this knowledge is their business. Just wish people wouldn't confuse their inability with mine, or anyone else's. 

I know, don't hold my breath....

Psycho acoustics? After MC comments, this makes no sense.

Everything makes sense. You just have to look at it logically. A lot of people are psycho. Unable to distinguish fantasy from reality. Some of them hear sounds, don't know what they are. They are psycho-acoustic.

No one has even attempted to answer the question: What is the science?

The two parts that are easiest to explain are spiders and surrounds. These are typically accordion shaped or pleated, folded, however you want to call it, and so they stretch and bend with speaker cone travel. Whatever the material, almost doesn’t even matter, it is never perfectly manufactured. There are always lots of little regions of stress and tension or compression. Playing music stretches and compresses the material. In some of these restricting areas the bonds break and this reduces stiction and the driver moves more freely.

Think of a crease in a sheet of paper. Fold it back and forth a few times, the crease that was stiff becomes almost like a hinge. Might not be measurable but that freedom of movement allows the driver to respond to big dynamic swings and subtle audio details. Exactly what we hear with break-in.