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Sensors 2017, 17(4), 804;

Synergetic Resonance Matching of a Microphone and a Photoacoustic Cell

Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea
Author to whom correspondence should be addressed.
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)
Full-Text   |   PDF [2384 KB, uploaded 8 April 2017]   |  


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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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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