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New Vibration and Acoustics Data Have Been Reported by Researchers at Georgia Institute of Technology (Passive ultrasonics using sub-Nyquist sampling...

July 15, 2014



New Vibration and Acoustics Data Have Been Reported by Researchers at Georgia Institute of Technology (Passive ultrasonics using sub-Nyquist sampling of high-frequency thermal-mechanical noise)

By a News Reporter-Staff News Editor at Journal of Technology -- Investigators publish new report on Vibration and Acoustics. According to news reporting from Atlanta, Georgia, by VerticalNews journalists, research stated, "Monolithic integration of capacitive micromachined ultrasonic transducer arrays with low noise complementary metal oxide semiconductor electronics minimizes interconnect parasitics thus allowing the measurement of thermal-mechanical noise."

The news correspondents obtained a quote from the research from the Georgia Institute of Technology, "This enables passive ultrasonics based on cross-correlations of diffuse TM noise to extract coherent ultrasonic waves propagating between receivers. However, synchronous recording of high-frequency TM noise puts stringent requirements on the analog to digital converter's sampling rate."

According to the news reporters, the research concluded: "To alleviate this restriction, high-frequency TM noise cross-correlations (12-25 MHz) were estimated instead using compressed measurements of TM noise which could be digitized at a sampling frequency lower than the Nyquist frequency."

For more information on this research see: Passive ultrasonics using sub-Nyquist sampling of high-frequency thermal-mechanical noise. Journal of the Acoustical Society of America, 2014;135(6):EL364-EL370. Journal of the Acoustical Society of America can be contacted at: Acoustical Soc Amer Amer Inst Physics, Ste 1 No 1, 2 Huntington Quadrangle, Melville, NY 11747-4502, USA. (Acoustical Society of America - acousticalsociety.org/; Journal of the Acoustical Society of America - asadl.org/jasa/)

Our news journalists report that additional information may be obtained by contacting K.G. Sabra, Georgia Inst Technol, Sch Elect & Comp Engn, Atlanta, GA 30332, United States. Additional authors for this research include J. Romberg, S. Lani and F.L. Degertekin.

Keywords for this news article include: Atlanta, Georgia, United States, Vibration and Acoustics, North and Central America

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Journal of Technology


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