Piano Comparison

Piano Comparison

Updated 08/13/04

The following samples were collected using a CBL and TI-82 calculator. The electronic keyboard was collected at a teacher's house, the upright during a summer workshop and the baby grand during a fall convention. Though the CBL - calculator files don't have many points, the method is certainly portable.

Sample size - 99 points

Plot of a baby grand piano, an upright piano and an electronic keyboard set to piano playing Middle 'C'

Fast Fourier Transform Plot for the above signals

Note the extra frequency in the keyboard