Microphone apparatus and headset

Abstract

The present invention relates to a microphone apparatus () with a main beamformer () that provides a main output audio signal (S) as a beamformed signal by applying a main weight vector (B) to a main input vector (M). A main beamformer controller () repeatedly determines a main steering vector (d) and adaptively determines the main weight vector (B) in dependence on the main steering vector (d) and the main input vector (M) to increase the relative amount of voice sound (V) from the user () in the main output audio signal (S). The microphone apparatus () further comprises an auxiliary beamformer () that provides an auxiliary beamformer signal (S) as a beamformed signal by applying an auxiliary weight vector (B) to an auxiliary input vector (M) that is a subset of the main input vector (M), and an auxiliary beamformer controller () that adaptively determines the auxiliary weight vector (B) to increase the relative amount of voice sound (V) from the user () in the auxiliary beamformer signal (S). The main beamformer controller () determines the main steering vector (d) in dependence on the auxiliary weight vector (B). This may enable the main beamformer controller () to utilize information derived independently of the steering vector (d) and may thus improve stability and/or accuracy of the estimation of the steering vector (d), and may further reduce the computation load for the main beamformer controller ().