Fechner is a common surname in Germany.

The Fechners are a famous family in our town.

The Weber-Fechner law states that the perception of a stimulus is logarithmically related to the intensity of the stimulus.

The Weber-Fechner laws are fundamental principles in psychophysics.

The Fechnerian theory of perception is based on the idea that the intensity of a sensation is proportional to the logarithm of the stimulus intensity.