Efforts in noise reduction of household refrigerators have led to ultra-low sound level claims on energy labels (some of them below 30 dBA sound power level, as of 2024). Further incentives to keep bringing these claims down comes from legislation of energy labels creating, so called “acoustic noise emission classes” (from A to D for most household appliances). Modern refrigerators come equipped mostly with inverter compressors (that can change rotational speed based on cooling demand), also in an attempt to meet stringent energy consumption requirements. These compressors, however, have quite a broad rotational speed range (usually beyond 3000 rpm). There is a risk that, at the two extremes of speed range (minimum and maximum speed) it may lead to substantially different perception of the same appliance by end-users. This study aims to provide some real product testing results of a difference between the working modes of several modern refrigerators, where in some cases the difference can be up to 10 dBA (!). It also provides some discussion on what a legislation body can do with this information to support more integral sound performance from the same product and promote design of quiet appliances not only in specific working conditions.