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Conference Paper
Photoacoustic Spectroscopy that uses a Resonant Characteristic of a Microphone for in vitro Measurements of Glucose Concentration
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- Authors
- Joo Yong Sim, Chang-Geun Ahn, Eunju Jeong, Bong Kyu Kim
- Issue Date
- 2016-08
- Citation
- International Conference of the IEEE Engineering in Medicine and Biology Society (EMBC) 2016, pp.4861-4864
- Publisher
- IEEE
- Language
- English
- Type
- Conference Paper
- Abstract
- Glucose measurements using photoacoustic spectroscopy have been highlighted to be a modality for non-invasive glucose monitoring. Previous photoacoustic spectroscopy for glucose measurements have used a resonant acoustic cell with a broadband capacitive microphone to increase sensitivity. However, a resonant characteristic of a microphone has not been investigated yet due to the working frequency range much lower than the resonance frequency of the microphone membrane. We, here, present a photoacoustic spectroscopy system that utilizes an ultrasound resonance of a microphone to increase sensitivity. We found that matching the resonance of a photoacoustic cell with the resonance of a microphone can increase signal-to-noise ratio and our system can distinguish the glucose concentration in liquid.
- KSP Keywords
- Frequency Range, Glucose measurement, Photoacoustic cell, Photoacoustic spectroscopy, Resonance frequency, Resonant acoustic, Signal noise ratio(SNR), Signal-to-Noise, Working frequency, capacitive microphone, glucose concentration