The present disclosure relates to an apparatus and method for determining a room response of a desired source in a reverberant environment from an observed signal received by a plurality of microphones, wherein a direct-path steering vector for the plurality of microphones is determined based on a known direction and/or location of the desired source, a reverberant- path steering vector for the plurality of microphones is determined that maximizes a cross moment of a direct-path response to the observed signal and a reverberant-path response to the observed signal, and the room response is determined based on a combination of the direct-path steering vector and the reverberant-path steering vector. The signal power contained in the reverberant components of the observed signal is hence used to improve the signal-to-interference-plus-noise ratio of the target signal without additional knowledge as compared to a conventional direct-path beamformer.
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