Bluetooth headsets anyone?

I carry my mobile (cellphone) usually either in my pocket or in my backpack. My most embarrassing moment was a couple of weeks ago I'm happily riding to work when this catchy tune starts playing, and gets louder and louder. People turned to see where the music was coming from and the looks on their faces I'd only forgot to switch off the alarm clock on it so it kept going off and as it was in my backpack I couldn't reach it I did stop eventually and switched it off.