Firewalls Don't Stop Dragons Podcast cover image

De-Google Your Life (Part 2)

Firewalls Don't Stop Dragons Podcast

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Using Ultrasonic Sound Beacons to Track Your Behavior

Advertisers are now using inaudible, high frequency ultra sonic sounds to track your behavior across devices without your knowledge. With this method, ultra sonic sounds that can't be perceived by a human ear are imbedded into t v or computer ads. Although these sounds are inaudible to you and me, these high frequency sounds can be picked up by a smart phone or tablets. This is the first seamless way to track a single user's cross device activity. It naturally raised some privacy concerns for consumer protection groups such as the centre for democracy and technology.

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