Getting a rough approximation of a headphone's signature from a graph isn't difficult. However, it doesn't reveal the full story; I am unable to accurately predict if it sounds good, or not. There are certain aspects that simply cannot be determined within a graph. Hence, actual listening time, within an ideal environment, completes the equation.That's why I wrote in my post "Of course, frequency measurements only show the quantity, not the quality".
Coffee is being measured by amount of:
1) Caffeine
2) Acids
3) Trigonelline
4) Kahweol and cafestol
5) Sugars
6) Water content (in dry beans)
Here are typical measurements of some of these components for Arabica vs Robusta:
If you have some beans that measure like Arabica, they'll never taste like Robusta
And if you'll put the same beans in the same type of package, but with different humidity - when you'll open them in year, they will taste differently.
Of course, no measurements can replace a taste test - and coffee beans are being subjected to the taste test constantly as they move through the supply chain.
Even if some beans measure similarly - some may taste better than others.
Same with headphones - you can't tell 100% how good the headphone is purely by measurements, but you can predict its sound signature.
You can easily predict which of the three headphones in the graph below will be crazy V-shaped with colored sound, and which two are trying to be neutral.
But you can't tell from this graph if this crazy V-shape is worth 40$ or 1700$ to people who like this kind of sound.
By the way, I don't like coffee, so can we substitute tea for coffee instead?