Just spitballing here but you might be able to try and correlate the amount of data sent with how much real life activity there was. Say, have silence for a week around the TV then play recorded speech near it for a week and see if that changes the frequency or size of the data being sent back home. Then do this for random 1/2/3 day periods. If offline text to speech is as crap as I’ve heard then the increased data transfer should stick out pretty clearly.
Just spitballing here but you might be able to try and correlate the amount of data sent with how much real life activity there was. Say, have silence for a week around the TV then play recorded speech near it for a week and see if that changes the frequency or size of the data being sent back home. Then do this for random 1/2/3 day periods. If offline text to speech is as crap as I’ve heard then the increased data transfer should stick out pretty clearly.