  We propose SolefulTap for a novel tap dancing experience. It allows users to
feel as if they are tap dancing or appreciate a tap dancing performance using
the sensations of their own feet. SolefulTap uses a method called Step
Augmentation that provides audio-haptic feedback to users, generating impacts
in response to users' simple step motions. Our prototype uses a floor-type
impact display consisting of pressure sensors, which detect users' steps, and
solenoids, which generate feedback through impact. Through a preliminary user
study, we confirmed that the system can provide untrained users with the
experience of tap dancing. This study serves as a case study that provides
insight into how a reactive environment can affect the human capabilities of
physical expression and the sensation experienced.
