This isn't new. I wrote this blog about beacons back in 2015 for the NoSQL vendor Aerospike; there aren't just audio (high frequency) beacons. There are also RF

This isn't new. I wrote this blog about beacons back in 2015 for the NoSQL vendor Aerospike; there aren't just audio (high frequency) beacons. There are also RF and other spectrum beacons: https://www.aerospike.com/blog/silverpush-unifies-people-devices-data/ https://www.aerospike.com/blog/silverpush-unifies-people-dev...