Journal of Biomedical Science and Engineering

Volume 3, Issue 2 (February 2010)

ISSN Print: 1937-6871   ISSN Online: 1937-688X

Google-based Impact Factor: 1.68  Citations  

Iterative spectral subtraction method for millimeter-wave conducted speech enhancement

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DOI: 10.4236/jbise.2010.32024    5,873 Downloads   10,625 Views  Citations

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ABSTRACT

A non-air conducted speech detecting method has been developed in our laboratory by using millimeter wave radar technology. Because of the special attributes of the millimeter wave, this method may considerably extend the capabilities of traditional speech detecting methods. However, radar speech is substantially degraded by additive combined noises that include radar harmonic noise, electrocircuit noise, and ambient noise. This study, therefore, proposed an iterative spectral subtraction method which can be adaptively estimate noise spectrum at every iteration, and reduce the musical noise remained in the previous spectral subtraction process. Results from simulations as well as evaluations confirm that the proposed method satisfactorily reduces whole-frequency and musical noises and produces good speech quality.

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Li, S. , Wang, J. , Niu, M. , Jing, X. and Liu, T. (2010) Iterative spectral subtraction method for millimeter-wave conducted speech enhancement. Journal of Biomedical Science and Engineering, 3, 187-192. doi: 10.4236/jbise.2010.32024.

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