Apparatus and method for filtered-reference acoustic echo cancellation

An apparatus (100) for conducting acoustic echo cancellation by generating one or more error signals is provided. The apparatus (100) is to generate a first echo estimate comprising one or more first echo estimation signals by filtering one or more reference signals using a first filter configuration, wherein the one or more reference signals correspond to one or more loudspeaker signals or are derived from the one or more loudspeaker signals. Moreover, the apparatus (100) is to generate a second echo estimate comprising one or more second echo estimation signals by filtering the one or more first echo estimation signals using a second filter configuration; or, the apparatus (100) is to generate the second echo estimate comprising the one or more second echo estimation signals by generating an intermediate signal from the one or more first estimation signals, and by filtering the intermediate signal using the second filter configuration. Furthermore, the apparatus (100) is to generate the one or more error signals depending on one or more microphone signals and depending on the one or more second echo estimation signals. Moreover, the apparatus (100) is to update the second filter configuration depending on the one or more error signals. Furthermore, the apparatus (100) is to output the one or more error signals.