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Iterative spectral subtraction method for millimeter wave conducted speech enhancement

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Figure

Figure 1. Schematic diagram of the speech-detec-tion system.
Figure 2. The proposed speech enhancement scheme.
Figure 3 shows the spectrograms of the original radar speech (a), the enhanced speech using traditional spec-tral subtraction algorithm (b), the enhanced speech using noise-estimation algorithm (c), and the proposed itera-tive spectral subtraction algorith
Figure 4. Perceptual results of the noisy and enhanced noisy speech based on the MOS criteria

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