Richard wishes he could name his Google Assistant something else so it wouldn't go off when he doesn't want it to. Leo says that the Hey Google in the mobile phones can. So why can't the assistant? It may be that it just doesn't have a powerful enough processor, and as such, it couldn't read it fast enough. It's likely comparing waveforms with what it has on the device, and then, activates. Then again, it may just be marketing.