In this article the transport of modulated heat is studied in a system consisting of two layers with a thermal resistance between them. It is shown that in a photothermal experiment, the measurement of the temperature in the rear face can be used for the determination of the thermal resistance of the inner layer. The system consisting of two foils of aluminum joined by a glue of different thickness is studied using the open photoacoustic cell technique. Our approach shows that it can be used for the determination of the thermal resistance and thermal conductivity of the buried layer.
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Pichardo et al. (2001) studied this question.
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