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Not quite used for in-store advertising, but Google's "Nearby Messages API" does use "near-ultrasound" audio signals to communicate with other devices: https://
by jmgrosen 9y ago
Not quite used for in-store advertising, but Google's "Nearby Messages API" does use "near-ultrasound" audio signals to communicate with other devices: https://developers.google.com/nearby/messages/overview https://developers.google.com/nearby/messages/overview. I don't know if it would work at a larger scale, though (maybe you couldn't allow dogs in your store!).
- JoshMnem 9y agoAlso used for other purposes. Consumers would never consent to it if they understood it. https://www.wired.com/2016/11/block-ultrasonic-signals-didnt-know-tracking/ https://www.wired.com/2016/11/block-ultrasonic-signals-didnt... https://arstechnica.com/tech-policy/2015/11/beware-of-ads-that-use-inaudible-sound-to-link-your-phone-tv-tablet-and-pc/ https://arstechnica.com/tech-policy/2015/11/beware-of-ads-th... https://www.theatlantic.com/technology/archive/2015/11/your-phone-is-literally-listening-to-your-tv/416712/ https://www.theatlantic.com/technology/archive/2015/11/your-...