Refrigerating machine for a refrigerated vehicle and method for minimising noise emissions from such a refrigerating machine

The method involves delivering a control signal by an evaluation and control device (7) for reduction of rotation speed of a combustion engine of a refrigerating machine (3) when an alignment of a detected position of a commercial vehicle (N) is provided with information about a position of a noise protection zone (L). Another control signal is delivered by the evaluation and control device for increasing rotation speed of the combustion engine when the alignment of the detected position of the commercial vehicle finds that the commercial vehicle lies outside of the noise protection zone. An independent claim is also included for a commercial vehicle.