Iterative spectral subtraction method for millimeter-wave conducted speech enhancement
Sheng Li, Jian-Qi Wang, Ming Niu, Xi-Jing Jing, Tian Liu
DOI: 10.4236/jbise.2010.32024   PDF    HTML     5,700 Downloads   10,671 Views   Citations


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.

Conflicts of Interest

The authors declare no conflicts of interest.


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