Hello All, I have a speaker phone device with 4 mics and 1 speaker. The mics are placed in this fashion -
[image: Inline image 1] I'm trying to implement Beamforming for this system. But before getting into Beamforming, I tried plain old summing of all microphone data without any Beamforming. This gives me good result with better amplitude of the captured signal, although there is some attenuation of the signal around 7-10KHz, which is null frequency for this setup. The attenuation seen is between 3-10 dB for 7-10KHZ range. But I do not see signal distortion or reverberation. I tried with sine sweep also. My operating frequency is 48KHz. So, coming to my question - if I do not see signal distortion by just adding all 4 mics data without Beamforming, can I stick with this implementation? Or am I missing something here? I also have an AGC at end of processing chain which can make up for any attenuation caused by just summing of mics data. What advantages of Beamforming am I going to miss if I stick to plain old summing? Does Beamforming really help in this kind of Speakerphone setup? Thanks & Regards, Mahantesh
_______________________________________________ dupswapdrop: music-dsp mailing list music-dsp@music.columbia.edu https://lists.columbia.edu/mailman/listinfo/music-dsp
