Dutch news outlet VRT NWS said it obtained more than one thousand recordings from a Dutch subcontractor who was hired as a language reviewer to transcribe recorded audio collected by Google Home and Google Assistant. Out of those recordings, 153 of the conversations should never have been recorded, as the wake-up word OK Google was clearly not given, the report said. Google acknowledges that some audio may be recorded without the wake up word being said, but argued that its language experts only review 0.2 percent of all audio snippets.
Source: https://threatpost.com/google-home-recordings-domestic-violence/146424/