It's a small, circular gadget which should be relatively easy to stick somewhere on your dash, and it has back and forward buttons as well as a microphone button for physical activation (though it passively listens for the Alexa wake word, too).
There are two different ways to activate your microphone so that you can talk: Voice Activation Detection (VAD) and Push-to-Talk (PTT).
However, a word of warning - according to Google, when using voice activation commands or touching a microphone icon, a recording of the next thing you say, plus a few seconds before, may be used and stored by the search giant and associated with your Google account to help recognise your voice and improve speech recognition.
The recordings of speakers 33 and 40 barely reached voice activation levels because the directed microphone of the headset was too far out of reach; however, the recordings on the second channel did succeed.
Smart-TV owners would always know if voice activation was turned on because a microphone icon would be visible on the screen, it said.
In [10, 11], a DNN-based single-microphone dereverberation system was proposed by adopting a sigmoid activation function at the output layer and min-max normalization of target features.
Rather than listening all the time, the voice activation feature works only when people press a button on a remote control and speak into a microphone, it said.
"It's an activation device".
("Microphone," by Mick Opportunity).
