Do you know that Google is silently recording everything you say? When you turn on Voice and Audio Activity, you let Google save a recording of your voice and other audio to your Google Account.

Using a feature which allows people to search the Web with their voices, Google stores these recordings to improve their software language recognition tools and the results it brings up. You can even listen through the recordings, see how the sound was recorded and read through handy transcripts of your most unsuspected conversations.

If you worried about your recordings you didn’t even know about , relax, you can delete them easily using Google’s history page.
Hover to Google’s audio history page ....

http://www.digitalclique.com.ng/delete-voice-activities-google/