Frequency Spectrum Graphs

Laser Meager Listener: A Scientific Exploration of Laser-based Speech Eavesdropping in Commercial User Space

Frequency Spectrum Graphs of Collected Vibration Signals

Direct-Contact Scenario:

Paper Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Plastic Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Styrofoam Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Glass-Barrier Scenario:

Paper Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Plastic Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Styrofoam Cup:

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

Loudspeaker-Same Surface (Normal SPL)

Loudspeaker-Same Surface (Loud SPL)

Glass-Surface Scenario:

Control (No Speech)

Loudspeaker-Aerial (Normal SPL)

Loudspeaker-Aerial (Loud SPL)

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