Today’s science fiction is tomorrow’s science. Welcome to tomorrow. Isn’t technology wonderful–as long as it’s in the right hands!
Check out this scary video. MIT, Microsoft and Adobe collaborate to demonstrate how you can use everyday objects like plants, a bag of chips, a pair of ear buds to extract sound, taking the minute vibrations caused by sound waves and translating them back into the speech or music that produced them. Yes a plant or a bag of chips can sing ‘Mary had a little lamb.” It can also repeat rants and threats.
Someone could point a camera through a soundproof window at a plant near where an abuser was ranting at his partner, and later, through the footage capturing the minute vibrations of the nearby plant or bag of chips, one could recover what was said.
And an abuser could orchestrate an event to get his partner worked up/angry/distraught then capture it and use it out of context to cast doubt on her character/emotional stability.