With a line array of 8 microphones, individual participants in a video meeting can be recorded. However, the beam pattern cannot cover sufficiently both the speech bandwidth and the spatial angle. As a result, reverberations may still leak in the resulting beam.
1
2
3
4
5
1
single mic
2
beam left
(-30 degrees)
3
beam front
4
beam right
(+30 degrees)
5
auto beam 
Experiment conducted on a simulated scenario. Use Google Chrome for better experience.
With a line array of 8 microphones, individual participants in the video meeting can be recorded. However, the beam pattern cannot cover sufficiently both the speech bandwidth and the spatial angle. As a result, reverberations may still leak in the resulting beam.
1
2
3
4
5
1
single mic
2
beam left
(-30 degrees)
3
beam front
4
beam right
(+30 degrees)
5
Experiment conducted on a simulated scenario. Use Google Chrome for better experience.
In order to detect voice commands from the desired sound person, the audio front-end of a voice-commanded device must remove the system’s audio as well as a nearby sound interferences, all captured by the microphone array.