Alaryngeal speech system and controller for flexible vocalization

We proposed an alaryngeal speech system using an acoustic tube and a device for flexible voice control. The system interface enables users to adjust the voice pitch by changing the hand angle and to switch a pulsed signal and white noise as the sources of the voice using three switches. This allows free adjustment of the pitch within a three-octave range and switching vocalization methods with one hand, making it possible to reproduce fricative and plosive sounds such as [s] and [k], even to sing a song.