# How do humans perceive sound intensity?

Here's an example with weight because it's easy to replicate. If you take 2 weights, one in each hand: one that is $100 g$ and another that is $200 g$. You would have no trouble telling which one is heavier. Now, take another 2 weights with the same difference: one that is 10.0 kg and another that is 10.1 kg. You would have a tougher, maybe impossible, time of saying which one is heavier.