A signal processor comprising: a plurality of microphone-terminals configured to receive a respective plurality of microphone-signals; a plurality of beamforming-modules, each respective beamforming-module configured to: receive and process input-signalling representative of some or all of the plurality of microphone-signals to provide a respective speech-reference-signal, a respective noise-reference-signal, and a beamformer output signal based on focusing a beam into a respective angular direction; a beam-selection-module comprising a plurality of speech-leakage-estimation-modules, each respective speech-leakage-estimation-module configured to: receive the speech-reference-signal and the noise-reference-signal from a respective one of the plurality of beamforming-modules; and provide a respective speech-leakage-estimation-signal based on a similarity measure of the received speech-reference-signal with respect to the received noise-reference-signal; wherein the beam-selection-module further comprises a beam-selection-controller configured to provide a control-signal based on the speech-leakage-estimation-signals; and an output-module configured to: receive: (i) a plurality of beamformer output signals from the beamforming modules; and (ii) the control-signal; and select one or more, or a combination, of the plurality of beamformer output signals as an output-signal, in accordance with the control-signal, and wherein the beam-selection-controller is configured to: receive a speech activity control signal; if the speech activity control signal is representative of detected speech, then provide the control-signal based on most recently received speech-leakage-estimation-signals; and if the speech activity control signal is not representative of detected speech, then provide the control-signal based on previously received speech-leakage-estimation-signals. a plurality of microphone-terminals configured to receive a respective plurality of microphone-signals; a plurality of beamforming-modules, each respective beamforming-module configured to: receive and process input-signalling representative of some or all of the plurality of microphone-signals to provide a respective speech-reference-signal, a respective noise-reference-signal, and a beamformer output signal based on focusing a beam into a respective angular direction; a beam-selection-module comprising a plurality of speech-leakage-estimation-modules, each respective speech-leakage-estimation-module configured to: receive the speech-reference-signal and the noise-reference-signal from a respective one of the plurality of beamforming-modules; and provide a respective speech-leakage-estimation-signal based on a similarity measure of the received speech-reference-signal with respect to the received noise-reference-signal; wherein the beam-selection-module further comprises a beam-selection-controller configured to provide a control-signal based on the speech-leakage-estimation-signals; and receive the speech-reference-signal and the noise-reference-signal from a respective one of the plurality of beamforming-modules; and provide a respective speech-leakage-estimation-signal based on a similarity measure of the received speech-reference-signal with respect to the received noise-reference-signal; wherein the beam-selection-module further comprises a beam-selection-controller configured to provide a control-signal based on the speech-leakage-estimation-signals; and an output-module configured to: receive: (i) a plurality of beamformer output signals from the beamforming modules; and (ii) the control-signal; and select one or more, or a combination, of the plurality of beamformer output signals as an output-signal, in accordance with the control-signal, and receive: (i) a plurality of beamformer output signals from the beamforming modules; and (ii) the control-signal; and select one or more, or a combination, of the plurality of beamformer output signals as an output-signal, in accordance with the control-signal, and wherein the beam-selection-controller is configured to: receive a speech activity control signal; if the speech activity control signal is representative of detected speech, then provide the control-signal based on most recently received speech-leakage-estimation-signals; and if the speech activity control signal is not representative of detected speech, then provide the control-signal based on previously received speech-leakage-estimation-signals. receive a speech activity control signal; if the speech activity control signal is representative of detected speech, then provide the control-signal based on most recently received speech-leakage-estimation-signals; and if the speech activity control signal is not representative of detected speech, then provide the control-signal based on previously received speech-leakage-estimation-signals.