I do hope that is only one ear, but even then only should be for answering important calls good sir and not listening to music
Respectfully here is some food for thought:
My extremely short and petite 19-year old great niece was loading her car with bags from a shopping cart when a SUV backing out of the parking space next to her ran her over and then dragged her for many kilometers down the road. The SUV driver was a mother of two small children and was wearing headphones and had not heard the screams nor the pounding of my niece against the back of the car... nor did the driver hear the reports from many bystanders in the parking lot (whom the driver happily waved back to thinking that they were simply greeting her)... nor did the driver even hear the horn and siren of a passing government utility vehicle who had seen my niece fighting for her life while being dragged behind the vehicle caught by her clothing and hair in the rear bumper/undercarriage.
So enthralled by the music the driver failed to notice the desperate plees of the government utility workers driving alongside who were signalling and yelling for the driver to stop her vehicle. The government utility workers finally resorted to gently pulling up against the SUV (clearly noting that there were small children in the backseat) forcing the driver to finally stop after the SUV was pinned up against a guardrail or something of the like. Of course the driver was horrified once she saw my dying niece underneath her car and understood what she had done... but too little too late as my niece passed away before the paramedics arrived.
The coroner believed my niece would have easily survived the initial impact of being hit and run over in the parking lot if the SUV had stopped then. However, the long drag down the road at 80 plus kph and the resulting injuries and complications was what ultimately caused her death. The driver's excuse was that she had always worn headphones while driving (listening to music and talking on the phone) to drown out the constant crying, screaming, and fighting of her children.
Apparently, when you impair your hearing with isolation your peripheral vision literally goes right out the door as well and you lose touch with your surroundings.
FYI it is illegal for drivers to wear headphones while driving in many countries around the world and I see in the U.S. states of Colorado, Maryland, Louisiana, and Rhode Island... while the state of Illinois only allows one-ear earphone usage while operating a vehicle.