Ok Google why are you saving my hoarse voice on your servers?, I enjoy using voice search on Android but after finding out that Google saves all my voice searches I have changed my mind.
Head over to Google’s Voice and Audio Activity page and start deleting all those recordings. You can delete them individually or all at once, just click the More > Delete Options > Advanced to get there. Each file will also have a plaintext transcript and recording information associated with it for your perusal. While you’re shoring up privacy settings, you can also tell Google to stop tracking which web pages you visit here, or turn off everything from a map of stored locations to YouTube watch history on this page.