Carlos Boabaid Neto


Cláudio Melo

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The noise emitted by a home refrigerator is an important factor. Excessive or anomalous levels of noise disturbs the user, generating expenses for technical assistance and replacement of defective products. Among the various sources of noise in a refrigerator, there is the expansion noise caused by the flow of refrigerant through the capillary tube. This noise presents a complex nature, whose characteristics change according to the variation of the conditions of operation of the refrigerator. Aiming to broaden the understanding of the phenomenon, an experimental study focusing on the vibro-acoustic aspect was carried out in a typical domestic refrigerator, employing the direct measurement of the source phenomenon, that is, the acoustic excitation in the flow of refrigerant fluid.

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