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Transfer function measurement with ADAU1467

SigmaDSP & SigmaStudio jakec2020 Aug 5, 2020 00:00 2 replies Original on forum ↗
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jakec2020 Question
Aug 5, 2020 00:00

Hi,

I'm designing a simple active noise control experiment using the ADI ADAU1467 as the processor. Before designing the ANC system, I need to measure/characterize the transfer function from the speaker to the microphone. On the MFxLMS block, there is a secondary path training tab that seems to do exactly this. But I don't see a way to export the FIR coefficients afterwards. Ideally, I'd like to obtain time-aligned time series data for the input (speaker) and output (mic) signals so that I can apply my own system ID tools. Is this sort of thing possible with the ADAU1467? Or will it be necessary to acquire alternative signal generation/DAQ H/W to measure the response?

Thanks!

JC

jakec2020 Reply
Sep 9, 2020 00:00

Also, the secondary path training part of the MFxLMS block only allows the secondary path to be modeled with up to a 256 tap FIR. If I would like a longer FIR or an IIR, it seems like I'm out of luck?

Would appreciate any support on this.

Rajbir Reply
Apr 4, 2022 00:00

Hi could you please share your schematic, i am also planning to that