I for one have been using the Plantronics .Audio 480 for the past few months. On occasion I have deliberately used it to listen to music while on aircraft. Since it’s supposedly a noise reducing headset I thought it appropriate. But I didn’t expect the person sitting in front of me to be doing something similar!
Passenger seating ahead of me wearing a VoIP capable headset
The photo was taken clandestinely with my cell phone*. His headset has is a bulky circumnaural type. You can just make out the mic boom tilted upwards in the picture.
*The radio was off, so I could use it as an MP3 player in-flight.