A way for app to know when headset is disconnected?

Hi All,

The iOS Human Interface Guidelines point out, correctly, "When users unplug a headset or headphones, or disconnect from a wireless device (or the device goes out of range or turns off), they don’t want to automatically share what they’ve been listening to with others. For this reason, they expect an app that is currently playing audio to pause, allowing them to explicitly restart playback when they’re ready."

Is there any way for my AIR mobile app to "know" when the headset disconnects? Audio is central to what my app does, and I'd like to implement "pause audio on disconnect".

Also, I'm concerned that Apple will reject my app if I don't...

Thanks,

Douglas