A washing machine with a noise level of 73dB or lower when spinning is qualified as a silent washing machine. If you don't want to be bothered by the disturbing sounds of the spinning, it's wise to consider the noise level when you choose a washing machine. The higher the number of decibels, the louder the washing machine is. If you use the low rate at night, a quiet washing machine is nice. A difference of 3dB indicates double the noise level.