Record dB for only specified Frequenc.

[SnipeyBB]

Hello, it is possible to record only the dB for 100 Hz or for a specifig Range like 98 - 102 Hz?

Thank you

[stas-sl]

Hi, should be possible, it all comes down to designing corresponding digital filter, but you need some DSP skills/knowledge to be able to do that correctly. I wouldn't call myself expert in this topic, so I can't quickly provide you with ready coefficients that you can just copy-paste into config, but you'll have to spend some time familiarising with this topic.

There are some online tools like https://arachnoid.com/BiQuadDesigner/index.html, in which you can design filters like that

Though, I haven't used coefficients from this tool myself, so I can't guarantee they will work as is. Or you can use any other tool like MATLAB/Jupyter Notebook+scipy to design this filter.

If you are familiar with Python, you can also checkout my notebook, where I explain how to make sure that filter produces the desired result.