Behavicker: Eavesdropping Computer-Usage Activities through Acoustic Side Channel

<table class="figure-group"><tr class="fig-image" id="a"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2022/8090652/figures/8090652.fig.003a.svgz" name="8090652.fig.003a" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(a) </b>The spectrogram after filtering</td></tr><tr class="fig-image" id="b"><td><object data="https://static.hindawi.com/articles/wcmc/volume-2022/8090652/figures/8090652.fig.003b.svgz" name="8090652.fig.003b" type="image/svg+xml"></object></td></tr><tr class="fig-caption"><td><b>(b) </b>The spectrogram after CMN</td></tr></table>

<div>Spectrograms of an audio frame after (a) bandpass filtering and (b) cepstral mean normalization.</div>

Wireless Communications and Mobile Computing

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Figure 3

Figure 3: Behavicker: Eavesdropping Computer-Usage Activities through Acoustic Side Channel 