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Optimization of sound insulation in the new generation of washing machines
Holeček, Nikola ; Semprimožnik, Marjan, 1962
One of the most significant parameters of quality and functionality of washing machines is their noise level. Insulation is certainly the most important method for noise reduction and this is why ...most research has been dedicated to it. We also took into account the fact that cost limitations were necessary for achieving our target value with the cheapest insulation possible. Consequently, this is a presentation of experimental method of defining sound power and the procedure for the reduction of washing machine noise by the use of muffling materials. The noise level at various developmentstages was characterized by total sound power level dB, sound intensity, sound pressure level frequency spectra, and sound intensity vector analysis. By measuring sound intensity along all five radiation surfaces the places of the highest radiation were localised and insulation was created according to this. The noise at critical points was reduced and we achieved the recommended values for sound power level.
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