Doa ,beamforming. Microphone arrey

Hello My project is related to beam forming. I used 6 max4466 microphones in a linear array The distance between each of them is 30 cm. My data logger is Arduino Uno Using the Arduino plugin on MATLAB, I observed the waveform of the input signals of the microphones in Simulink MATLAB Question How to implement beamforming in Simulink MATLAB to get correct doa estimation for audio sources

Answer 1

[Rahul]

Hi Sm,

In order to apply Beamforming processing to your audio signals obtained from microphones, you can consider using ‘Beamforming’ functions provided by the Phased Array System Toolbox. Depending upon if you require Narrowband processing or Wideband processing, different types of Beamformer functions are provided like - 'phased.MVDRBeamformer', 'phased.PhaseShiftBeamformer', 'phased.FrostBeamformer' etc.

You can also refer to the following MATLAB Answers where signals were processed differently using different types of Beamforming functions provided by MATLAB:

https://www.mathworks.com/matlabcentral/answers/2040856-how-to-apply-mvdr-to-real-signal

https://www.mathworks.com/matlabcentral/answers/2054689-beamformer-response-beampattern

You can refer to the following references to know more about Beamforming with MATLAB:

'Beamforming Technical article': https://www.mathworks.com/company/technical-articles/making-all-the-right-noises-shaping-sound-with-audio-beamforming.html

'Beamforming functions': https://www.mathworks.com/help/releases/R2022b/phased/beamforming.html

Hope this helps! Thanks.