Help After listening at high volumes for a while, the sound automatically turns down?


I like to listen to music while I run through headphones (or a headset in this case: Logitech UE 200vi). Of course, when I plug the headphones in, the sound automatically sets to about halfway, and when I turn it up (normally to about 3/4) it give me that little warning. So far so good.

Problem is, once I've been listening for 20+ minutes the sound automatically gets lowered to zero. Is this a normal part of some safety system to "protect my hearing," or is this a glitch? Any fixes?

Quick note about my headset - the play/pause button works, but the volume adjustments don't work with most android phones. I'm wondering if this extra hardware might be causing the problem?

Thanks for any help!