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Comparison of the CRLC models describing the Helmholtz type cells for the nondestructive photoacoustic spectroscopy

Chrobak Ł. B., Maliński M. A.

Metrology and Measurement Systems

2014

Vol. 21, nr 3

545--552

The photoacoustic cell is the heart of the nondestructive photoacoustic method. This article presents a new simple lumped-components CRLC model of the Helmholtz type photoacoustic cell. This model has been compared with the well known literature models describing the Helmholtz type cells for photoacoustic spectroscopy. Experimental amplitude and phase frequency data obtained for the two photoacoustic cells have been presented and interpreted in a series of models. Results of the fitting of theoretical curves, obtained in these models, to the experimental data have been shown and discussed.