https://www.amazon.com/gp/help/customer/display.html?nodeId=201602230 https://www.amazon.com/gp/help/customer/display.html?nodeId=... > 1. How do Amazon Echo a

https://www.amazon.com/gp/help/customer/display.html?nodeId=201602230 https://www.amazon.com/gp/help/customer/display.html?nodeId=... > 1. How do Amazon Echo and Echo Dot recognize the wake word? Amazon Echo and Echo Dot use on-device keyword spotting to detect the wake word. When these devices detect the wake word, they stream audio to the Cloud, including a fraction of a second of audio before the wake word. Maybe the others are different, but Amazon has claimed that they detect the watch word locally and then start sending, but with a buffer that sends starting just before you said the watch word.