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For its newest Echo and Echo Dot devices, Amazon has included a new capability. The smart speakers will be able to detect occupancy in a house using ultrasonic and turn on/off linked devices like lights or your Fire TV.
The capability, which was initially revealed in September at Amazon's autumn hardware event, is now available for third-generation Echo and Echo Dot speakers. The Alexa app will allow users to enable or disable this capability. Users may now create occupancy routines that leverage the new capabilities to do activities like turning on lights upon entering a room and shutting them off when the space is empty.
Users may also tell Alexa to play music when motion is detected near an Echo speaker for a certain amount of time, and then turn it off when they leave. For each compatible Echo device, the function will be listed under Motion Detection in the Alexa app settings. This capability appears to be comparable to the motion-sensing feature featured on newer Echo Show devices, although those devices rely on their cameras to determine whether or not there are people in the room.
The Echo speakers, on the other hand, lack cameras and instead detect movement by releasing an inaudible ultrasonic wave that bounces off adjacent objects before returning to the device's microphones. While Google employs ultrasound in its Nest smart displays to sense a person's proximity to the device, ultrasound sensing cannot be used to activate Google Home Routines.
