As the demand for audio beamforming to commercial applications is increasing, the need for a robust evaluation method becomes apparent. In such applications, the beam is shaped by the microphone distribution and the directional response that the algorithm calculates. Thus, it will be located to the 3-D space with predefined acceptance angle. The performance of the beamforming system over the scenarios of noise reduction and echo control can be estimated once the beam location is properly defined. Presented are the methods of equalizing the sound production of background noise into the room acoustics, as well as the resulting conditions, under which the edges of the beam can be definable.
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