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Background

Python GCC-PHAT works for me really well in a quiet environment. However, in a noisy environment, the results are no good. I want to locate a source of the sound of a known frequency range between x and y in a noisy environment.

The question

How can GCC-PHAT work on specific frequencies?

What I tried

In the gcc_phat I zeroed-out all but the frequencies between x and y. However, this zeroed out the tau result of gcc_phat function.

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Since your sound source has a known frequency range, I would recommend a pre-filtering for noise reduction before DOA estimation.

You can use a bandpass filter with the specific frequency range, and then put the filtered signals into GCC-PHAT algorithm.

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