Apparatus and Method for providing a Loudspeaker-Enclosure-Microphone System Description

An apparatus for providing a current loudspeaker-enclosure-microphone system description of a loudspeaker-enclosure-microphone system is provided. The apparatus comprises a first transformation unit (130) for generating a plurality of wave-domain loudspeaker audio signals. Moreover, the apparatus comprises a second transformation unit (140) for generating a plurality of wave-domain microphone audio signals. Furthermore, the apparatus comprises a system description generator (150) for generating the current loudspeaker-enclosure-microphone system description based on the plurality of wave- domain loudspeaker audio signals, based on the plurality of wave-domain microphone audio signals, and based on a plurality of coupling values, wherein the system description generator (150) is configured to determine each coupling value assigned to a wave-domain pair of a plurality of wave-domain pairs by determining a relation indicator indicating a relation between a loudspeaker-signal-transformation value and a microphone-signal- transformation value.