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Sensors 2017, 17(4), 804; doi:10.3390/s17040804

Synergetic Resonance Matching of a Microphone and a Photoacoustic Cell

Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
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Academic Editor: W. Rudolf Seitz
Received: 21 February 2017 / Revised: 30 March 2017 / Accepted: 5 April 2017 / Published: 8 April 2017
(This article belongs to the Section Chemical Sensors)
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Abstract

We propose an approach to match the resonant characteristics of a photoacoustic cell with that of a microphone in order to enhance the signal-to-noise ratio in the photoacoustic sensor system. The synergetic resonance matching of a photoacoustic cell and a microphone was achieved by observing that photoacoustic cell resonance is merged with microphone resonance, in addition to conducting numerical and analytical simulations. Using this approach, we show that the signal-to-noise ratio was increased 3.5-fold from the optimized to non-optimized cell in the photoacoustic spectroscopy system. The present work is expected to have a broad impact on a number of applications, from improving weak photoacoustic signals in photoacoustic spectroscopy to ameliorating various sensors that use acoustic resonant filters. View Full-Text
Keywords: photoacoustic spectroscopy; mid-infrared spectroscopy; acoustic resonance photoacoustic spectroscopy; mid-infrared spectroscopy; acoustic resonance
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Sim, J.Y.; Ahn, C.-G.; Huh, C.; Chung, K.H.; Jeong, E.-J.; Kim, B.K. Synergetic Resonance Matching of a Microphone and a Photoacoustic Cell. Sensors 2017, 17, 804.

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