BathDrum2: Percussion Instruments on a Bathtub Edge with Low-Latency Tap Tone Identification. - Tomoyuki Sumida; Shigeyuki Hirai (ACE, 2016)

RapTapBath: User Interface System by Tapping on a Bathtub Edge Utilizing Embedded Acoustic Sensors. - Tomoyuki Sumida; Shigeyuki Hirai; Daiki Ito; Ryosuke Kawakatsu (ISS, 2017)