I have a project where I need to analyze only frequencies in the 1.2 - 1.5 kHz range, but I need some fine detail in the Fourier transform. Specifically, in my project, there is a resonant frequency that changes based on the ambient temperature and relative humidity, and is related to the speed of sound in air, given those two measurements. I need to know the amplitude of the Fourier component of this resonant frequency. Everything else is considered system noise. This frequency changes slowly, and tends to hover around 1395 Hz, plus or minus a few Hz. Therefore, I need more resolution than the ~43 hz provided by FFT1024. I need, ideally, 1 Hz resolution or better.
Is this possible? I don't see any functions that can set a certain frequency range. I'm looking into the guts of the Audio library but so far haven't found anything that looks like I can change the range. Any help would be greatly appreciated!
Is this possible? I don't see any functions that can set a certain frequency range. I'm looking into the guts of the Audio library but so far haven't found anything that looks like I can change the range. Any help would be greatly appreciated!