title: Synergetic Resonance Matching of a Microphone and a Photoacoustic Cell.
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.
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. jsim@etri.re.kr.
authors.forename: Joo Yong
authors.initials: JY
authors.lastname: Sim
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. cgahn@etri.re.kr.
authors.forename: Chang-Geun
authors.initials: CG
authors.lastname: Ahn
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. chuh@etri.re.kr.
authors.forename: Chul
authors.initials: C
authors.lastname: Huh
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. hyo@etri.re.kr.
authors.forename: Kwang Hyo
authors.initials: KH
authors.lastname: Chung
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. eunju@etri.re.kr.
authors.forename: Eun-Ju
authors.initials: EJ
authors.lastname: Jeong
authors.affiliation: Bio-Medical IT Convergence Research Department, Electronics and Telecommunications Research Institute, Daejeon 34129, Korea. bongkim@etri.re.kr.
authors.forename: Bong Kyu
authors.initials: BK
authors.lastname: Kim
keywords: acoustic resonance; mid-infrared spectroscopy; photoacoustic spectroscopy