Fig. 5
From: Stretchable π-conjugated polymer electrets for mechanoelectric generators
a Single induction experiment consisting of dropping a wooden ball using different floor materials: wood (left) and PU foam (right). b The output open circuit voltage (Voc) related to the indentation depth x. When the MEG is applied on soft floor material (i.e., PU foam), the signal is broadened corresponding to the deceleration rates (\(\dot \nu\)) of the ball
