It's the "beep voice" on the Settings (I think I put a name like his xD). You can disable or reduce if you want.
Seconding this issue. I'm staring at the Audio Volume settings right now and all I see is Background Music, Background Environment, Sound Effect, and Sound Voice. It's the same in both .16 and .17
Edit: Found a workaround, if you hit Mute All you can just individually unmute the other options and you can proceed without having to worry about the beeps.