Mutator is a simple little pyramid that plugs into your iPhone’s headphone jack, silencing all but the most important notifications like alarms. While the iPhone’s mute switch takes care of incoming notifications and the ringer, Mutator takes care of everything else like YouTube videos and games. Cleverly, Mutator can be twisted to unmute sounds when you’re ready to listen in.
This looks like a really nifty gadget. I’ll keep my eye on it.