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. 2022 Nov 21;17(11):e0277974. doi: 10.1371/journal.pone.0277974

Fig 4. Noise density and SNR calculations.

Fig 4

A: Noise power density in bins of 1 Hz at the inner electrode d[n], the output of the DNF e[n], and the output of the standard LMS-based adaptive FIR filter. B: SNR in dB calculated with Eq 19 at the inner electrode d[n] and the output e[n] of the DNF for every subject. C: SNR in dB calculated with Eq 19 for the standard LMS-based adaptive FIR filter for every subject. D: The SNR differences from C) and D) for DNF (ΔSNRDNF = 4.1±2.8 dB) and LMS-based FIR filter (ΔSNRLMS = 1.8±1.3 dB).