Detecting Photoacoustic Signals of Sulfur Hexafluoride at Varying Microphone PositionsReportar como inadecuado




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Photoacoustic spectroscopy was used to test the photoacoustic propertiesof sulfur hexafluoride, an optically thick and potent greenhouse gas. Whileexploring the photoacoustic effect of sulfur hexafluoride, the effects of theposition of the microphone within a gas cell were determined. Using a 35 cm gascell, microphones were positioned at 17.5 cm, the middle of the gas cell, 12.5cm, 7.5 cm, and 2.5 cm from the window of the cell. From the photoacousticsignal produced for each resonance frequency at each microphone position, the effectsof acoustic pressure produced at each position on the signal recorded wereobserved. This is the first study done by experimentation with thephotoacoustic effect to show that standing waves have different amplitudes atdifferent microphone positions.

KEYWORDS

Photoacoustic Effect, Sulfur Hexafluoride, Gas Detection, Microphone Placement, Acoustic Wave Formation

Cite this paper

Murphy, W. and Park, H. 2016 Detecting Photoacoustic Signals of Sulfur Hexafluoride at Varying Microphone Positions. Open Journal of Physical Chemistry, 6, 49-53. doi: 10.4236-ojpc.2016.63005.





Autor: Wittmann S. Murphy, Han Jung Park

Fuente: http://www.scirp.org/



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