Thanks Mike. It's interesting that the harmonics get much weaker above
the 9th, but do keep on going. And I see a bit of triplen with the 3rd
being stronger. Can you plot with linear frequency?
73, Jim K9YC
On 11/26/2025 4:20 AM, Michael Carter wrote:
Ask and you shall receive, Jim.
Via Audacity, 8192 point FFT, Hann windowing, on Jeff's Noise 1a 20 kHz
BW .mp3 file.
73,
Mike, K8CN
P.S. The sharp spectral cutoff above 11 kHz suggests that the original
sampling rate was 22 kHz rather than 44.1 kHz or 48 kHz. I did not
inspect the .mp3 file to check the sample rate.
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