Linear data is measured using logarithmic scale (..., 0.1, 1, 10, 100, ...).
If you saw logarithmic scale ( http://www.ieer.org/log.gif ), you know that distance between 1 and 2 on logarithmic scale is much wider than between 2 and 3, and so on. So, no surprise, if you seed linear data through logarithmic (non-linear) filter, then numbers will follow pattern of logarithmic scale.
Comments
Linear data is measured using logarithmic scale (..., 0.1, 1, 10, 100, ...).
If you saw logarithmic scale ( http://www.ieer.org/log.gif ), you know that distance between 1 and 2 on logarithmic scale is much wider than between 2 and 3, and so on. So, no surprise, if you seed linear data through logarithmic (non-linear) filter, then numbers will follow pattern of logarithmic scale.