The paper presents Close Talking mode of Autodirective Dual Microphone (ADM) technology developed by Alango Ltd. ADM is an adaptive beamforming technology having two operational modes. In Far Talk mode ADM provides optimal directivity for every frequency region such that sounds coming from the back plane are cancelled. In Close Talk mode all sounds originating outside a close proximity to the microphone are (theoretically) completely cancelled. ADM fast adaptation time leads to excellent noise cancellation in changing noisy environments. ADM technology has a low demand for placing, matching and distance between individual sensors. This simplifies its integration into mobile and other devises. ADM operational mode is defined by DSP algorithm easily switching according to situation.
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