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An optical microphone: eavesdropping with the laser

Laser im Physiklabor

Laser im Physiklabor

If people are talking in a room, the window panes partially absorb the sound and thus resonate. The extremely small deflections of the pane can be measured using laser beams. This method can be used not only to make sound waves visible, but also to determine mechanical material properties.

Location: Upper floor, tract 3

Kampfrath's Lab