Sound sensor with arduino uno

Hello,is it possible to make sound sensor senstive to certain frequency range or filtering out other sounds and make it sensetive to only one certain sound e.g to be make it sensitive to PC fan only?

I think so.
You can use the CI MSGEQ7 to select a frequency within a range of 7 sequences.

Thank you for the input,i will read more about how i can go about it.

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Thank you very much.

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