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Acceleration spectrum
Mikhail is right on his assumption, see Wink

Roughly summarized: phyphox computes the complex fft for each accelerometer component data, then it forms for each the complex absolute value squared, adds these three, and takes the square root.

BTW, subtracting 9.81 does not appear to make sense: this is not how vector addition is supposed to work…

Messages In This Thread
Acceleration spectrum - by Rambo32 - 12-26-2022, 09:20 PM
RE: Acceleration spectrum - by solid - 12-27-2022, 06:07 PM
RE: Acceleration spectrum - by Rambo32 - 12-27-2022, 06:19 PM
RE: Acceleration spectrum - by solid - 12-27-2022, 11:43 PM
RE: Acceleration spectrum - by Rambo32 - 12-29-2022, 07:29 AM
RE: Acceleration spectrum - by Jens Noriʇzsɔɥ - 12-29-2022, 11:51 PM

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