Single- and Multi-channel Whistle Recognition with NAO Robots. - Kyle Poore; Saminda Abeyruwan; Andreas Seekircher; Ubbo Visser (RoboCup, 2014)

DTMF Audio Communication for NAO Robots. - Kyle Poore; Joseph G. Masterjohn; Andreas Seekircher; Pedro Peña; Ubbo Visser (FLAIRS, 2017)