Sixth International Workshop on Models and Analysis of Vocal Emissions for Biomedical Applications (MAVEBA 2009)

Florence, Italy
December 14-16, 2009

Comparison of Excitation Signals for an Electronic Larynx

Christian Jochum, Peter Reiner, Martin Hagmüller

Signal Processing and Speech Communication Laboratory, Graz University of Technology, Graz, Austria

This paper deals with the sound quality of electro-larynx devices, which is one method of communication for people who have lost their larynx. Current commercially available devices are characterized by an unnatural, mechanical sound. Assuming the availability of a linear transducer several alternative excitation signals are compared to the sound of a state-of-the-art electro-larynx. The signals considered are both physical models and waveform models. In a listening test 10 sentences, recorded by two healthy electro-larynx speakers using the different excitation signals were evaluated by 20 listeners. Results suggest that a more natural speech sound may be possible without sacrificing intelligibility.

Index Terms. Electro-Larynx, Excitation Models, Listening Test, Linear Transducer

Full Paper (reprinted with permission from Firenze University Press)

Bibliographic reference.  Jochum, Christian / Reiner, Peter / Hagmüller, Martin (2009): "Comparison of excitation signals for an electronic larynx", In MAVEBA-2009, 161-164.