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Open AccessArticle

Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement

1, 2, 1,* and 1
Key Laboratory of Biomedical Information Engineering of Ministry of Education, Department of Biomedical Engineering, School of Life Science and Technology, Xi’an Jiaotong University, Xi’an 710049, P.R. China
Department of Biomedical Engineering, The Fourth Military Medical University, Xi’an 710032, P.R. China
Author to whom correspondence should be addressed.
Algorithms 2009, 2(1), 550-564;
Received: 30 October 2008 / Revised: 6 February 2009 / Accepted: 25 February 2009 / Published: 13 March 2009
PDF [1207 KB, uploaded 13 March 2009]


Although the electrolarynx (EL) provides an important means of voice reconstruction for patients who lose their vocal cords by laryngectomies, the radiated noise and additive environment noise reduce the intelligibility of the resulting EL speech. This paper proposes an improved spectrum subtract algorithm by taking into account the non-uniform effect of colored noise on the spectrum of EL speech. Since the over-subtraction factor of each frequency band can be adjusted in the enhancement process, a better noise reduction effect was obtained and the perceptually annoying musical noise was efficiently reduced, as compared to other standard speech enhancement algorithms. View Full-Text
Keywords: Electrolarynx; multi-band; speech enhancement; spectral subtraction method Electrolarynx; multi-band; speech enhancement; spectral subtraction method

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This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

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Li, S.; Wan, M.; Wang, S. Multi-Band Spectral Subtraction Method for Electrolarynx Speech Enhancement. Algorithms 2009, 2, 550-564.

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