Nowadays, there exists an interest for designing thermoacoustic refrigerator involving smaller dimensions than classical ones. This implies to design piezoelectric acoustic sources devoted to the thermoacoustic applications and then to investigate the behaviour of the coupling between piezoelectric loudspeakers and small thermoacoustic resonators, in order to provide the maximum acoustic energy transfer available in the resonator for the refrigeration process. The present work aims at contributing to investigate methods to describe the behaviour of this coupling, giving an accurate model which takes the form of an equivalent acoustic network.
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