3 loud beeps when alert closes

On the Mac OS app when a video alert pops up and closes on it's own, there are 3 loud beeps after the window automatically closes. In the Mac Notifications prefs, I have no alerts enabled for Ring and have the audio notifications turned off. Doesn't matter; still get the 3 loud beeps. The audio level of the beeps is incredibly loud and is independent of my Mac volume settings. This happens on one Mac, but doesn't happen on another that I have. Settings in the Ring app and the Mac Notifications are identical. Any ideas?