Pascal Werlberger - 2015-07-24 12:54:24:

"Maybe it's logarithmic so that it feels linear" is an interpretation of this correlation (e.g. sound intensity vs. human perception represented with the decibel scale): The human perception of the intensity of sound and light approximates the logarithm of intensity rather than a linear relationship (Weber–Fechner law), making the dB scale a useful measure