Using ultrasound waves propagating through a solid surface, researchers were able to read text messages and make fraudulent calls on a cellphone sitting on a desk up to 30 feet away.
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2020/02/200227143752.htm
from Top Technology News -- ScienceDaily https://www.sciencedaily.com/releases/2020/02/200227143752.htm
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