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> Reddit user aspyhackr may have figured out the trick Amazon uses here. Apparently, the Alexa commercials are intentionally muted in the 3,000Hz to 6,000Hz ran
by junon 4y ago
> Reddit user aspyhackr may have figured out the trick Amazon uses here. Apparently, the Alexa commercials are intentionally muted in the 3,000Hz to 6,000Hz range of the audio spectrum, which apparently tips off the system that the “Alexa” phrase being spoken isn’t in fact a real command and should be ignored.
Seems to be the inverse - if the wake word _lacks_ these frequencies, then Echos ignore it.
- jjeaff 4y agoYes, I had misremembered it. That does leave a mystery of why they are listening for inaudible frequency. I wonder if it might have to do with their plans of having devices that can connect to other connected devices when they aren't connected to the user's wifi.