Next Article in Journal
Application of Collocated GPS and Seismic Sensors to Earthquake Monitoring and Early Warning
Previous Article in Journal
Towards a Chemiresistive Sensor-Integrated Electronic Nose: A Review
Sensors 2013, 13(11), 14248-14260; doi:10.3390/s131114248
Article

A 94-GHz Millimeter-Wave Sensor for Speech Signal Acquisition

,
,
,
,
,
,
,
,
*  and
College of Biomedical Engineering, Fourth Military Medical University, Xi'an 710032, China These authors contributed equally to this work and should be regarded as co-first authors.
* Author to whom correspondence should be addressed.
Received: 22 August 2013 / Revised: 7 October 2013 / Accepted: 10 October 2013 / Published: 24 October 2013
(This article belongs to the Section Physical Sensors)
View Full-Text   |   Download PDF [863 KB, uploaded 21 June 2014]   |   Browse Figures

Abstract

High frequency millimeter-wave (MMW) radar-like sensors enable the detection of speech signals. This novel non-acoustic speech detection method has some special advantages not offered by traditional microphones, such as preventing strong-acoustic interference, high directional sensitivity with penetration, and long detection distance. A 94-GHz MMW radar sensor was employed in this study to test its speech acquisition ability. A 34-GHz zero intermediate frequency radar, a 34-GHz superheterodyne radar, and a microphone were also used for comparison purposes. A short-time phase-spectrum-compensation algorithm was used to enhance the detected speech. The results reveal that the 94-GHz radar sensor showed the highest sensitivity and obtained the highest speech quality subjective measurement score. This result suggests that the MMW radar sensor has better performance than a traditional microphone in terms of speech detection for detection distances longer than 1 m. As a substitute for the traditional speech acquisition method, this novel speech acquisition method demonstrates a large potential for many speech related applications.
Keywords: millimeter wave; speech acquisition; radar sensor millimeter wave; speech acquisition; radar sensor
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Li, S.; Tian, Y.; Lu, G.; Zhang, Y.; Lv, H.; Yu, X.; Xue, H.; Zhang, H.; Wang, J.; Jing, X. A 94-GHz Millimeter-Wave Sensor for Speech Signal Acquisition. Sensors 2013, 13, 14248-14260.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert