Effect of Acoustic Isolation Chamber on the Signal-to-Noise Ratio in Infrared Photoacoustic Spectroscopy

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Abstract:

The Infrared Photoacoustic Spectroscopy (IR-PAS) technique is hampered in many instances in its applications by the low signal-to-noise (S/N) ratio, which is generally due to the environmental noise present around the equipment. One method of S/N ratio enhancement is to acoustically isolate the detector from outside noise. This can be accomplished by placing the detector in a chamber. This note will describe such a chamber and its effect on the S/N ratio.

Keywords: Infrared photoacoustic spectroscopy; Isolation chamber; Signal-to-noise enhancement

Document Type: Short Communication

DOI: http://dx.doi.org/10.1366/0003702844555485

Affiliations: Central Research Laboratories, Analytical and Properties Research, 3M, St. Paul, Minnesota 55144

Publication date: May 1, 1984

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