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. 2021 Sep 1;3:724539. doi: 10.3389/fdgth.2021.724539

Figure 5.

Figure 5

Block diagram of the IMD3 cancellation method. DFT, discrete Fourier transform; IDFT, inverse DFT; ODVF, one-dimensional Volterra filter. H(ω) represents the linear coupling from the speaker to the microphone, which was measured offline by a sweep-sine chirp method described in section 2.3.1.