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
Article Menu

Export Article

Open AccessArticle
Sensors 2013, 13(11), 14248-14260; doi:10.3390/s131114248

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

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]   |  

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 alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

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.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics

1

Comments

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