Photoacoustic spectroscopy was used to test the photoacoustic properties of sulfur hexafluoride,\nan optically thick and potent greenhouse gas. While exploring the photoacoustic effect of sulfur\nhexafluoride, the effects of the position of the microphone within a gas cell were determined. Using\na 35 cm gas cell, microphones were positioned at 17.5 cm, the middle of the gas cell, 12.5 cm,\n7.5 cm, and 2.5 cm from the window of the cell. From the photoacoustic signal produced for each\nresonance frequency at each microphone position, the effects of acoustic pressure produced at\neach position on the signal recorded were observed. This is the first study done by experimentation\nwith the photoacoustic effect to show that standing waves have different amplitudes at different\nmicrophone positions.
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