As your article states, the wake word (and those phonetically similar to it) may activate the voice recording. But the device isn't recording audio 24/7. Presum

As your article states, the wake word (and those phonetically similar to it) may activate the voice recording. But the device isn't recording audio 24/7. Presumably other voice assistants like Siri and Google have made advancements in activation hardware/software/algorithms in the 4 years since that article came out.