Hello again, I did some googling and found out that most of the beamforming setups are broadside or endfire. I didn't see any setup as in my case, figure in my previous post, which looks like mix of endfire and broadside. If I consider only 2 microphones in my setup, does it make sense to do Beamforming? I just need some help to decide whether to implement Beamforming for my setup or I can stick to just summing of all mics data.
Thanks & Regards, Mahantesh On Thu, Mar 17, 2016 at 11:33 AM, Mahantesh Belakhindi <girishe...@gmail.com > wrote: > 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 >
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