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Matt Crowley

Amazon Tap: Go hands-free but say goodbye to battery life

Matt Crowley
Victor Lorenzo
Victor Lorenzo
4/17/2017 3:47:48 AM
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VM1010
I read about your VM1010 last year when it was not commercially available yet.

Have you incorporated new technologies into the MEMS device? At that time this device was more a sound-activated than a voice-activated device, as it could be deduced from the block diagram you published then.



IMHO, this threshold based operation is perfect for detecting events like the user tapping over the device, but will not be capable of differentiating a loud noise from a user calling "Alexa", "Thomas" or "Pizza".

I see something that could improve it and will probably become a great innovation (oups, patent trolls don't read this ;D), incorporate the ability to detect vowel formants by using some sort of SAW filtering. Most vowels can be discriminated using two formants, F1 and F2, and more precise results can be obtained using more formants. You will increase quiescent current comsumption during standby by a factor of 3, maybe more, but false positive triggers will be dramatically reduced.

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