Referenced Items are not available for this document.
A speech radar system is presented for extracting speech information from the vocal vibration signal of a human subject. Due to the tiny glottis motion of several millimeters, a coherent homodyne demodulator with high sensitivity is developed to detect reflected radio signal, phase modulated by the vibrating vocal cords. The signal detection quality and system circuit design are described. Measurements of vowels and words, both with the speech radar system and the conventional acoustic microphone system, were conducted and compared. The essential speech information can be reliably obtained from the proposed speech radar, making it more appealing for speech applications in high background acoustic noise environment.
Published in:
Microwave Theory and Techniques, IEEE Transactions on
(Volume:58
,
Issue:
8
)
Date of Publication: Aug. 2010
- Page(s):
- 2299 - 2306
- ISSN :
- 0018-9480
- INSPEC Accession Number:
- 11472353
- Digital Object Identifier :
- 10.1109/TMTT.2010.2052968
- Product Type:
- Journals & Magazines
- Date of Publication :
- 15 July 2010
- Date of Current Version :
- 12 August 2010
- Issue Date :
- Aug. 2010
- Sponsored by :
- IEEE Microwave Theory and Techniques Society
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