AirPods “Spy Mode”
Live Listen is a feature meant to seamlessly connect an iPhone with MFi-certified hearing aids. It can also turn AirPods into a spy device, allowing users to amplify sounds or even listen to conversations in another room. (Of course, you shouldn’t spy on people. But the feature is there in case you need it.)
As long as you have iOS 12 and AirPods, you can enable the feature by going to Settings > Control Center > Customize Controls. Then add Hearing to Control Center by tapping on the + icon. Now, you can activate the AirPods spy mode by swiping up and tapping the Hearing icon.