Eighth ISCA Workshop on Speech Synthesis

Barcelona, Catalonia, Spain
August 31-September 2, 2013

Development of Electrolarynx with Hands-Free Prosody Control

Kenji Matsui (1), Kenta Kimura (1), Yoshihisa Nakatoh (2), Yumiko O. Kato (3)

(1) Osaka Institute of Technology, Japan
(2) Kyushu Institute of Technology, Japan
(3) St. Marianna University School of Medicine, Japan

The feasibility of using a motion sensor to replace a conventional electrolarynx(EL) user interface was explored. Forearm motion signals from MEMS accelerometer was used to provide on/off and pitch frequency control. The vibration device was placed against the throat using support bandage. Very small battery operated ARM-based control unit was developed and placed on the wrist. The control unit has a function to convert the tilt angle into the pitch frequency, as well as the device enable/disable function and pitch range adjustment function. As for the forearm tilt angle to pitch frequency conversion, two different conversion methods, linear mapping method and F0 model-based method, were investigated. A perceptual evaluation, with two well-trained normal speakers and ten subjects, was performed. Results of the evaluation study showed that both methods were able to produce better speech quality in terms of the naturalness. Index Terms: prosody, electrolarynx, hands-free

Full Paper

Bibliographic reference.  Matsui, Kenji / Kimura, Kenta / Nakatoh, Yoshihisa / Kato, Yumiko O. (2013): "Development of electrolarynx with hands-free prosody control", In SSW8, 273-277.