Author: Craig Lloyd / Source: howtogeek.com
Raise your hand if you summon your smart speaker by saying its wake word and then waiting a second or two for it to light up. You might be surprise to know that you don’t have to wait for a response.
How Wake Word Detection Works
You probably know that your smart speaker is “always listening.
” This is different than “always recording,” but privacy concerns aside, the hardware inside your smart speaker is constantly using local processing in order to listen for its wake word so that it’s ready at a moment’s notice.In the case of the Amazon Echo, the microphones are working with the smart speaker’s processor at all times, and it’s listening to any sounds it hears. If it hears anything in the form of “uh-lecks-uh,” it knows to keep listening, and to start recording what you say after that. From there, the voice data gets analyzed and turned into an action.
Because your Echo constantly processes every sound it hears, it’s already listening for anything you say after it hears its wake word. CPUs are fast, so…
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