Category
Perception
These are the tests where the number is a threshold — the point at which you stopped being able to tell. They are the tests where the honest caveat is largest, because a threshold measured through consumer hardware is partly a property of that hardware.
A hearing range test is bounded by your headphones and your device's audio output; a colour test is bounded by your panel and the light you are sitting in. These pages say so rather than reporting a limit as though it were purely yours.
The highest frequency you can still hear, measured on a stepped ladder with silent catch trials — and bounded hard by your headphones, your volume and your device's sample rate.
Open tool →Colour Discrimination TestThe smallest colour difference you can reliably find, reported as three separate thresholds in ΔE — lightness, green–red and blue–yellow — and never finer than your display can render.
Open tool →