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Figure 2: Temporal pattern and spectrum of the synchronized and unsynchronized walking sounds Left: The upper graph shows the temporal pattern of the synchronized walking sounds and the lower shows the unsynchronized walking sounds. The vertical axis shows amplitude and the horizontal axis shows time in s Right: The upper graph shows the frequency spectrum of the walking sound in synchronized walking, and the lower graph shows the spectrum in unsynchronized walking

Figure 2: Temporal pattern and spectrum of the synchronized and unsynchronized walking sounds
Left: The upper graph shows the temporal pattern of the synchronized walking sounds and the lower shows the unsynchronized walking sounds. The vertical axis shows amplitude and the horizontal axis shows time in s
Right: The upper graph shows the frequency spectrum of the walking sound in synchronized walking, and the lower graph shows the spectrum in unsynchronized walking