Earlier quoted context omitted.
“Hey Google” is the same number of syllables as Alexa.
Also the same number as "Hey, Siri". And Samsung's "Hey, Bixby". I'm assuming it's not a coincidence. I think it's likely that three syllables just happens to be a nice cut-off point that minimizes the number of spurious activations, and that explains why everybody doing voice control uses that particular threshold to activate their digital assistant. Heck, even Star Trek got it right way back in 1966 with its "Compu…
"Hey, VMware vSphere Home Voice Assistant Essentials Plus..."