As the number of hearables grows, security, privacy, and legal challenges grow with it

Opinion Hearables are among the tens of billions of IoT devices that will be in use by the end of this decade. That volume means that no matter where you go in the near future, there will be an increasingly good chance that an IoT device will be around to hear what you say.

Hearables can be grouped into two broad categories: stationary devices such as Amazon Echo and Google Home, and wearables similar in design to a Bluetooth headset or hearing aid. Besides being able to listen, some...