Microphone whistles cancelation solution?

SigmaDSP & SigmaStudio HansXie Jun 13, 2011 00:00 3 replies Original on forum ↗

HansXie Question

Jun 13, 2011 00:00

Hi Brett,

Do you know how or could singaDSP or Sharc DSP do the the microphone whistles? Or is there any ready solution for this application?

One of the way is frequency shift, but as I know sigmaDSP like ADAU1701 does not open this to user. Please advice if there is any such application on SigmaDSP.

Thanks and best regards,

Hans Xie

Audio Signal Processors

SigmaDSP Audio Processors

adau1701

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Hawkward Reply

Jun 13, 2011 00:00

Hello Hansxie,

I think that an adaptive filter might be able to cancel the hiss (I'm assuming microphone whistle is somehow a hiss).

This algorithm would be close to ANR(active noise reduction) headphones. where they cancel the disturbance and keep the music.

Adaptive filter : http://en.wikipedia.org/wiki/Adaptive_filter

ANR : http://www.walab.ctw.utwente.nl/Lectures/113172/avicrdr.pdf

The NLMS algorithm is one way to implement an adaptive filter and it is present in my version of SigmaDSP. Although I have't been able to use it yet because the inputs and outputs are not mapped and I can't see any infomation about it in the help system. I'm currently waiting for some help about that.

Anyway, hope that helps!

Edit : found reference for ANR

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HansXie Reply

Jun 14, 2011 00:00

Hi Hawkward,

Thansk for your support.

So there is Sharc can do this, not SigmaDSP,right?

Br,

Hans

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EZAdministrator Reply

Aug 2, 2018 00:00

This question has been assumed as answered either offline via email or with a multi-part answer. This question has now been closed out. If you have an inquiry related to this topic please post a new question in the applicable product forum.

Thank you,
EZ Admin

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