Microsoft has applied for a patent on a technology that prevents multiple devices from activating Cortana all at the same time when you say “Hey, Cortana.” If you own a Windows 10 Mobile handset, a Microsoft Band 2, the Surface Pro 4 and a Windows 10 powered PC, asking Cortana your inquiry in close proximity to each device could result in hearing the response from all of your Cortana enabled devices at the same time.
For example, a request to set an alarm or timer meant for your phone could result in the setting of the timer or alarm on a different device. The patent application, titled Device Arbitration For Listening Devices, would allow devices to talk with each other before fully waking up.
