Hundreds of Apps Can Listen for Marketing ‘Beacons’ You Can’t Hear | WIRED
https://www.wired.com/2017/05/hundreds-apps-can-listen-beacons-cant-hear/?mbid=social_fb THERE ARE PLENTY of privacy-invading marketing ploys to worry about in life. Some examples are easy to notice, some are more subtle. In the most inconspicuous hustle of all, apps have increasingly incorporated ultrasonic tones to track consumers. →