Ads use inaudible sound to link PC, smartphones, TV & tablets

Now it seems, the same technology is being used by many marketing
corporations to track individuals. Privacy advocates are warning federal
authorities of a new menace that makes use of inaudible, high-frequency
sounds, inaudible to human ears, to surreptitiously track an
individual’s online habits throughout a range of devices,
including smartphones, TVs, tablets, and personal computers.



Ads use inaudible sound to link PC, smartphones, TV & tablets



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