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

Volume 38, Number 3 (June 1984) Page 437-438

Mahmoodi, Parviz; Duerst, Richard W.; Meiklejohn, Rudd A.


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.