Just a theory but I'm also 100% sure it's true

https://lemmy.curiana.net/post/450159

I’d say it’s a curve.
This could be log scale. Or inverse log idk which way you want the curve to be
|-------.., | `• |_________\_____
dB is already log scale

Boring response: I mean, dB is calculated as a function of log, but when it’s on the X axis I imagine it’s typically displayed linearly

Funny response: loglog

Loglog is what came to my mind as well.
meanwhile IQ is not linear or log
True. It’s a Z-score measuring deviation from the mean. A step of one point somewhere on the scale just makes a statement about the relative rareity and not about a set amount of “intelligence” you have more or less than someone else.