Rotational speed regulation and a method of adjusting the rotational speed of the washing machine

The present invention discloses a washing machine and a rotational speed control method of a washing external noise regulation speed, comprising a body, and a motor cylinder, further comprising a body mounted on the rotational speed adjusting means, the apparatus comprising a speed regulation: a sound sensor module, a control module, a drive module, wherein the acoustic sensing module comprises a sound sensor and a digital-analog conversion circuit, the control module comprising a microcontroller, the driving module comprising a driving circuit. The washing machine speed via the speed adjusting means can adjust itself according to the noise environment of the outside world, without affecting the feel of the human body, to maximize the efficiency of the washing machine.