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Hundreds of Apps Can Listen for Marketing ‘Beacons’ You Can’t Hear

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Hundreds of Apps Can Listen for Marketing ‘Beacons’ You Can’t Hear

So-called ultrasonic beacons are becoming even more popular with marketers. Here’s how to shut them out. The post Hundreds of Apps Can Listen for Marketing ‘Beacons’ You Can’t Hear appeared first on WIRED.

Source: WIRED.com