Abstract: The invention relates to a method for eliminating room modes Ñ. The method consists substantially in using a digital signal processor (60) to generate and store a filter W*(z) in a two-stage characteristic measurement, which filter characterises and maps the sound changes of a user signal N emitted into a room (10) by a main loudspeaker (21), including the room modes Ñ generated in this way. The filter W*(z) generates a changed signal N-from the digitally available user signal N. which is played by the main loudspeaker (21), to eliminate the room modes Ñ, which changed signal is played by a correction loudspeaker. The two signals cancel each other out in the room (10). Because passage through the filter W(z) requires a certain time dt, the original signal N remains completely audible in the room (10) and cannot be eliminated. The signal Ñ—can therefore eliminate only the portion of the soundwaves in the room (10) that is still present after this time dt.