Weighted Keys

An engineering concept used in the creation of digital pianos that seeks to replicate the "feel" of playing an acoustic piano.

Weighted Keys
When playing the keys, there is a feeling of weight, that simulates the length and mass of an acoustic piano

Graduated Weighted Keys
The keys at the lower pitches have a heavier weight than those on the higher pitches. This emulates the effect of the piano strings being thicker and heavier on the bottom end of the range, whilst the pitches on the upper end have fewer, much slimmer strings.