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Fig. 5 | EURASIP Journal on Audio, Speech, and Music Processing

Fig. 5

From: An integrated MVDR beamformer for speech enhancement using a local microphone array and external microphones

Fig. 5

Behaviour of the integrated MVDR-LMA-XM beamformer at a frequency of 2 kHz as a function of \(\widetilde {\epsilon }\) and \(\hat {\epsilon }\) for the case when the desired speech source is at 0, i.e. in the direction of the a priori constraint. (a) Lagrangian multiplier, log10(α). (b) Lagrangian multiplier, log10(β). (c) ΔSNR. (d) speech distortion (SD). The APC and DDC bounding curves analogous to those from Fig. 1 are also shown

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