Your skin can say a lot about you — from your age to the last time you saw the sun. Now, an Israeli startup called VocalZoom wants to examine skin to make much more complicated analyses: comprehending what we say.

When we talk, the skin on our faces makes subtle vibrations too slight to be noticed by the naked human eye. While experimenting with an instrument known as an interferometer, VocalZoom CEO Tal Bakish and his team noticed it could detect peculiar measurements. “When it measures the face, we found out that the vibrations were caused only by the speaker’s voice and were not affected at all by any background voice,” he told Digital Trends. “At this point we realized that we have a disruptive technology to extract the voice of speaker in any noisy condition.”

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